42553431 has 24 divisors (see below), whose sum is σ = 67498704. Its totient is φ = 26697600.

The previous prime is 42553409. The next prime is 42553451. The reversal of 42553431 is 13435524.

It is not a de Polignac number, because 42553431 - 2¹⁰ = 42552407 is a prime.

It is a super-2 number, since 2×42553431² = 3621588979743522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 42553395 and 42553404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42553451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1020 + ... + 9281.

It is an arithmetic number, because the mean of its divisors is an integer number (2812446).

Almost surely, 2^42553431 is an apocalyptic number.

42553431 is a deficient number, since it is larger than the sum of its proper divisors (24945273).

42553431 is a wasteful number, since it uses less digits than its factorization.

42553431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10333 (or 10321 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 42553431 is about 6523.2990886514. The cubic root of 42553431 is about 349.1227855635.

Adding to 42553431 its reverse (13435524), we get a palindrome (55988955).

The spelling of 42553431 in words is "forty-two million, five hundred fifty-three thousand, four hundred thirty-one".