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42455431 = 99142841
BaseRepresentation
bin1010000111110…
…1000110000111
32221212221220101
42201331012013
541332033211
64113544531
71023602524
oct241750607
987787811
1042455431
1121a68437
1212275147
138a46375
1458d214b
153ad95c1
hex287d187

42455431 has 4 divisors (see below), whose sum is σ = 42499264. Its totient is φ = 42411600.

The previous prime is 42455423. The next prime is 42455471. The reversal of 42455431 is 13455424.

42455431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42455431 - 23 = 42455423 is a prime.

It is a super-2 number, since 2×424554312 = 3604927242791522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42455431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42455471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20430 + ... + 22411.

It is an arithmetic number, because the mean of its divisors is an integer number (10624816).

Almost surely, 242455431 is an apocalyptic number.

42455431 is a deficient number, since it is larger than the sum of its proper divisors (43833).

42455431 is an equidigital number, since it uses as much as digits as its factorization.

42455431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43832.

The product of its digits is 9600, while the sum is 28.

The square root of 42455431 is about 6515.7832222995. The cubic root of 42455431 is about 348.8545711434.

It can be divided in two parts, 424 and 55431, that added together give a palindrome (55855).

The spelling of 42455431 in words is "forty-two million, four hundred fifty-five thousand, four hundred thirty-one".

Divisors: 1 991 42841 42455431