31103329992 has 64 divisors (see below), whose sum is σ = 93543859200. Its totient is φ = 8418945600.

The previous prime is 31103329979. The next prime is 31103329993. The reversal of 31103329992 is 29992330113.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (31103329993) 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, 4868884 + ... + 4875267.

It is an arithmetic number, because the mean of its divisors is an integer number (1461622800).

Almost surely, 2^31103329992 is an apocalyptic number.

It is an amenable number.

31103329992 is an abundant number, since it is smaller than the sum of its proper divisors (62440529208).

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

31103329992 is a wasteful number, since it uses less digits than its factorization.

31103329992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9744186 (or 9744182 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 42.

The spelling of 31103329992 in words is "thirty-one billion, one hundred three million, three hundred twenty-nine thousand, nine hundred ninety-two".