31312203132 has 48 divisors (see below), whose sum is σ = 83512647680. Its totient is φ = 8944903872.

The previous prime is 31312203119. The next prime is 31312203133. The reversal of 31312203132 is 23130221313.

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

It is a junction number, because it is equal to n+sod(n) for n = 31312203099 and 31312203108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312203133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 564798 + ... + 617754.

Almost surely, 2^31312203132 is an apocalyptic number.

It is an amenable number.

31312203132 is an abundant number, since it is smaller than the sum of its proper divisors (52200444548).

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

31312203132 is a wasteful number, since it uses less digits than its factorization.

31312203132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60010 (or 60008 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31312203132 its reverse (23130221313), we get a palindrome (54442424445).

The spelling of 31312203132 in words is "thirty-one billion, three hundred twelve million, two hundred three thousand, one hundred thirty-two".