31320456451996 has 48 divisors (see below), whose sum is σ = 58604905175040. Its totient is φ = 14620217984960.

The previous prime is 31320456451957. The next prime is 31320456451997. The reversal of 31320456451996 is 69915465402313.

It is a super-2 number, since 2×31320456451996² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is a self number, because there is not a number n which added to its sum of digits gives 31320456451996.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31320456451997) 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, 34154500 + ... + 35059531.

It is an arithmetic number, because the mean of its divisors is an integer number (1220935524480).

Almost surely, 2^{31320456451996} is an apocalyptic number.

It is an amenable number.

31320456451996 is a deficient number, since it is larger than the sum of its proper divisors (27284448723044).

31320456451996 is a wasteful number, since it uses less digits than its factorization.

31320456451996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69214194 (or 69214192 counting only the distinct ones).

The product of its (nonzero) digits is 20995200, while the sum is 58.

The spelling of 31320456451996 in words is "thirty-one trillion, three hundred twenty billion, four hundred fifty-six million, four hundred fifty-one thousand, nine hundred ninety-six".