31355440102 has 32 divisors (see below), whose sum is σ = 54322099200. Its totient is φ = 13295752800.

The previous prime is 31355440097. The next prime is 31355440139. The reversal of 31355440102 is 20104455313.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2265399 + ... + 2279197.

It is an arithmetic number, because the mean of its divisors is an integer number (1697565600).

Almost surely, 2^31355440102 is an apocalyptic number.

31355440102 is a deficient number, since it is larger than the sum of its proper divisors (22966659098).

31355440102 is a wasteful number, since it uses less digits than its factorization.

31355440102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15516.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 31355440102 its reverse (20104455313), we get a palindrome (51459895415).

The spelling of 31355440102 in words is "thirty-one billion, three hundred fifty-five million, four hundred forty thousand, one hundred two".