31397370206 has 4 divisors (see below), whose sum is σ = 47096055312. Its totient is φ = 15698685102.

The previous prime is 31397370187. The next prime is 31397370209. The reversal of 31397370206 is 60207379313.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31397370209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7849342550 + ... + 7849342553.

It is an arithmetic number, because the mean of its divisors is an integer number (11774013828).

Almost surely, 2^31397370206 is an apocalyptic number.

31397370206 is a deficient number, since it is larger than the sum of its proper divisors (15698685106).

31397370206 is a wasteful number, since it uses less digits than its factorization.

31397370206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15698685105.

The product of its (nonzero) digits is 142884, while the sum is 41.

The spelling of 31397370206 in words is "thirty-one billion, three hundred ninety-seven million, three hundred seventy thousand, two hundred six".