31327672321 has 16 divisors (see below), whose sum is σ = 36653135040. Its totient is φ = 26471689920.

The previous prime is 31327672253. The next prime is 31327672331. The reversal of 31327672321 is 12327672313.

It is a cyclic number.

It is not a de Polignac number, because 31327672321 - 2¹⁷ = 31327541249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31327672331) 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, 1403010 + ... + 1425163.

It is an arithmetic number, because the mean of its divisors is an integer number (2290820940).

Almost surely, 2^31327672321 is an apocalyptic number.

It is an amenable number.

31327672321 is a deficient number, since it is larger than the sum of its proper divisors (5325462719).

31327672321 is a wasteful number, since it uses less digits than its factorization.

31327672321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2828256.

The product of its digits is 63504, while the sum is 37.

The spelling of 31327672321 in words is "thirty-one billion, three hundred twenty-seven million, six hundred seventy-two thousand, three hundred twenty-one".