31206660213 has 16 divisors (see below), whose sum is σ = 42872688320. Its totient is φ = 20176200576.

The previous prime is 31206660211. The next prime is 31206660241.

31206660213 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 31206660213 - 2¹ = 31206660211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31206660211) 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, 423808 + ... + 491961.

It is an arithmetic number, because the mean of its divisors is an integer number (2679543020).

Almost surely, 2^31206660213 is an apocalyptic number.

It is an amenable number.

31206660213 is a deficient number, since it is larger than the sum of its proper divisors (11666028107).

31206660213 is a wasteful number, since it uses less digits than its factorization.

31206660213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916116.

The product of its (nonzero) digits is 7776, while the sum is 30.

The spelling of 31206660213 in words is "thirty-one billion, two hundred six million, six hundred sixty thousand, two hundred thirteen".