42051431 has 8 divisors (see below), whose sum is σ = 42764304. Its totient is φ = 41342400.

The previous prime is 42051403. The next prime is 42051461. The reversal of 42051431 is 13415024.

42051431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42051431 is a prime.

It is a super-2 number, since 2×42051431² = 3536645698295522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42051461) 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 7 ways as a sum of consecutive naturals, for example, 28256 + ... + 29706.

It is an arithmetic number, because the mean of its divisors is an integer number (5345538).

Almost surely, 2^42051431 is an apocalyptic number.

42051431 is a deficient number, since it is larger than the sum of its proper divisors (712873).

42051431 is a wasteful number, since it uses less digits than its factorization.

42051431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 42051431 is about 6484.7074721995. The cubic root of 42051431 is about 347.7444919513.

Adding to 42051431 its reverse (13415024), we get a palindrome (55466455).

The spelling of 42051431 in words is "forty-two million, fifty-one thousand, four hundred thirty-one".