31312230072102 has 96 divisors (see below), whose sum is σ = 81625709867520. Its totient is φ = 8474465669760.

The previous prime is 31312230072077. The next prime is 31312230072103. The reversal of 31312230072102 is 20127003221313.

31312230072102 is a `hidden beast` number, since 31 + 312 + 2 + 300 + 7 + 2 + 10 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312230072103) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19109658 + ... + 20683410.

It is an arithmetic number, because the mean of its divisors is an integer number (850267811120).

Almost surely, 2^{31312230072102} is an apocalyptic number.

31312230072102 is an abundant number, since it is smaller than the sum of its proper divisors (50313479795418).

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

31312230072102 is a wasteful number, since it uses less digits than its factorization.

31312230072102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1582098 (or 1582095 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

Adding to 31312230072102 its reverse (20127003221313), we get a palindrome (51439233293415).

The spelling of 31312230072102 in words is "thirty-one trillion, three hundred twelve billion, two hundred thirty million, seventy-two thousand, one hundred two".