31311022134 has 32 divisors (see below), whose sum is σ = 72023913216. Its totient is φ = 8889023520.

The previous prime is 31311022109. The next prime is 31311022139. The reversal of 31311022134 is 43122011313.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31311022134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311022139) 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, 2367612 + ... + 2380799.

It is an arithmetic number, because the mean of its divisors is an integer number (2250747288).

Almost surely, 2^31311022134 is an apocalyptic number.

31311022134 is an abundant number, since it is smaller than the sum of its proper divisors (40712891082).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31311022134 is a wasteful number, since it uses less digits than its factorization.

31311022134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4748580.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 31311022134 its reverse (43122011313), we get a palindrome (74433033447).

The spelling of 31311022134 in words is "thirty-one billion, three hundred eleven million, twenty-two thousand, one hundred thirty-four".