31275520207 has 4 divisors (see below), whose sum is σ = 31287455496. Its totient is φ = 31263584920.

The previous prime is 31275520193. The next prime is 31275520223. The reversal of 31275520207 is 70202557213.

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

It is a cyclic number.

It is not a de Polignac number, because 31275520207 - 2¹¹ = 31275518159 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 (31275527207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5963713 + ... + 5968954.

It is an arithmetic number, because the mean of its divisors is an integer number (7821863874).

Almost surely, 2^31275520207 is an apocalyptic number.

31275520207 is a deficient number, since it is larger than the sum of its proper divisors (11935289).

31275520207 is a wasteful number, since it uses less digits than its factorization.

31275520207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11935288.

The product of its (nonzero) digits is 29400, while the sum is 34.

The spelling of 31275520207 in words is "thirty-one billion, two hundred seventy-five million, five hundred twenty thousand, two hundred seven".