31240440511279 has 2 divisors, whose sum is σ = 31240440511280. Its totient is φ = 31240440511278.

The previous prime is 31240440511271. The next prime is 31240440511289. The reversal of 31240440511279 is 97211504404213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31240440511279 - 2³ = 31240440511271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31240440511271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15620220255639 + 15620220255640.

It is an arithmetic number, because the mean of its divisors is an integer number (15620220255640).

Almost surely, 2^{31240440511279} is an apocalyptic number.

31240440511279 is a deficient number, since it is larger than the sum of its proper divisors (1).

31240440511279 is an equidigital number, since it uses as much as digits as its factorization.

31240440511279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 31240440511279 in words is "thirty-one trillion, two hundred forty billion, four hundred forty million, five hundred eleven thousand, two hundred seventy-nine".