31643622523 has 16 divisors (see below), whose sum is σ = 33446286720. Its totient is φ = 29854858176.

The previous prime is 31643622509. The next prime is 31643622541. The reversal of 31643622523 is 32522634613.

It is a cyclic number.

It is not a de Polignac number, because 31643622523 - 2²¹ = 31641525371 is a prime.

It is a super-2 number, since 2×31643622523² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31643622553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13222215 + ... + 13224607.

It is an arithmetic number, because the mean of its divisors is an integer number (2090392920).

Almost surely, 2^31643622523 is an apocalyptic number.

31643622523 is a deficient number, since it is larger than the sum of its proper divisors (1802664197).

31643622523 is a wasteful number, since it uses less digits than its factorization.

31643622523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4986.

The product of its digits is 155520, while the sum is 37.

The spelling of 31643622523 in words is "thirty-one billion, six hundred forty-three million, six hundred twenty-two thousand, five hundred twenty-three".