42402313431 has 56 divisors (see below), whose sum is σ = 66117231360. Its totient is φ = 27147960000.

The previous prime is 42402313411. The next prime is 42402313451. The reversal of 42402313431 is 13431320424.

42402313431 is a `hidden beast` number, since 424 + 0 + 231 + 3 + 4 + 3 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (42402313411) and next prime (42402313451).

It is not a de Polignac number, because 42402313431 - 2⁵ = 42402313399 is a prime.

It is a super-2 number, since 2×42402313431² (a number of 22 digits) 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 = 42402313395 and 42402313404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42402313411) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 4032681 + ... + 4043181.

Almost surely, 2^42402313431 is an apocalyptic number.

42402313431 is a deficient number, since it is larger than the sum of its proper divisors (23714917929).

42402313431 is a wasteful number, since it uses less digits than its factorization.

42402313431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10739 (or 10724 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 42402313431 its reverse (13431320424), we get a palindrome (55833633855).

The spelling of 42402313431 in words is "forty-two billion, four hundred two million, three hundred thirteen thousand, four hundred thirty-one".