31797144013 has 32 divisors (see below), whose sum is σ = 34164523008. Its totient is φ = 29542708800.

The previous prime is 31797143941. The next prime is 31797144019. The reversal of 31797144013 is 31044179713.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31797144013 is a prime.

It is a super-4 number, since 4×31797144013⁴ (a number of 43 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31797144019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29968503 + ... + 29969563.

It is an arithmetic number, because the mean of its divisors is an integer number (1067641344).

Almost surely, 2^31797144013 is an apocalyptic number.

It is an amenable number.

31797144013 is a deficient number, since it is larger than the sum of its proper divisors (2367378995).

31797144013 is a wasteful number, since it uses less digits than its factorization.

31797144013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513.

The product of its (nonzero) digits is 63504, while the sum is 40.

The spelling of 31797144013 in words is "thirty-one billion, seven hundred ninety-seven million, one hundred forty-four thousand, thirteen".