31211292428 has 48 divisors (see below), whose sum is σ = 57187565568. Its totient is φ = 14890680000.

The previous prime is 31211292403. The next prime is 31211292433. The reversal of 31211292428 is 82429211213.

It is a super-2 number, since 2×31211292428² (a number of 22 digits) contains 22 as substring.

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, 1999253 + ... + 2014803.

It is an arithmetic number, because the mean of its divisors is an integer number (1191407616).

Almost surely, 2^31211292428 is an apocalyptic number.

It is an amenable number.

31211292428 is a deficient number, since it is larger than the sum of its proper divisors (25976273140).

31211292428 is a wasteful number, since it uses less digits than its factorization.

31211292428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15854 (or 15852 counting only the distinct ones).

The product of its digits is 13824, while the sum is 35.

The spelling of 31211292428 in words is "thirty-one billion, two hundred eleven million, two hundred ninety-two thousand, four hundred twenty-eight".