42156252631 has 4 divisors (see below), whose sum is σ = 42435433264. Its totient is φ = 41877072000.

The previous prime is 42156252587. The next prime is 42156252643. The reversal of 42156252631 is 13625265124.

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 42156252631 - 2³³ = 33566318039 is a prime.

It is a super-2 number, since 2×42156252631² (a number of 22 digits) 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 (42156252731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139590090 + ... + 139590391.

It is an arithmetic number, because the mean of its divisors is an integer number (10608858316).

Almost surely, 2^42156252631 is an apocalyptic number.

42156252631 is a deficient number, since it is larger than the sum of its proper divisors (279180633).

42156252631 is a wasteful number, since it uses less digits than its factorization.

42156252631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279180632.

The product of its digits is 86400, while the sum is 37.

The spelling of 42156252631 in words is "forty-two billion, one hundred fifty-six million, two hundred fifty-two thousand, six hundred thirty-one".