253515231055 has 4 divisors (see below), whose sum is σ = 304218277272. Its totient is φ = 202812184840.

The previous prime is 253515231019. The next prime is 253515231077. The reversal of 253515231055 is 550132515352.

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

It is not a de Polignac number, because 253515231055 - 2²¹ = 253513133903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25351523101 + ... + 25351523110.

It is an arithmetic number, because the mean of its divisors is an integer number (76054569318).

Almost surely, 2^253515231055 is an apocalyptic number.

253515231055 is a deficient number, since it is larger than the sum of its proper divisors (50703046217).

253515231055 is an equidigital number, since it uses as much as digits as its factorization.

253515231055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50703046216.

The product of its (nonzero) digits is 112500, while the sum is 37.

The spelling of 253515231055 in words is "two hundred fifty-three billion, five hundred fifteen million, two hundred thirty-one thousand, fifty-five".