311215257305053 has 4 divisors (see below), whose sum is σ = 314712057949020. Its totient is φ = 307718456661088.

The previous prime is 311215257305021. The next prime is 311215257305093. The reversal of 311215257305053 is 350503752512113.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16194853664089 + 295020403640964 = 4024283^2 + 17176158^2 .

It is a cyclic number.

It is not a de Polignac number, because 311215257305053 - 2⁵ = 311215257305021 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 (311215257305093) 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, 1748400321850 + ... + 1748400322027.

It is an arithmetic number, because the mean of its divisors is an integer number (78678014487255).

Almost surely, 2^{311215257305053} is an apocalyptic number.

It is an amenable number.

311215257305053 is a deficient number, since it is larger than the sum of its proper divisors (3496800643967).

311215257305053 is an equidigital number, since it uses as much as digits as its factorization.

311215257305053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3496800643966.

The product of its (nonzero) digits is 472500, while the sum is 43.

The spelling of 311215257305053 in words is "three hundred eleven trillion, two hundred fifteen billion, two hundred fifty-seven million, three hundred five thousand, fifty-three".