253157278247 has 4 divisors (see below), whose sum is σ = 253158304320. Its totient is φ = 253156252176.

The previous prime is 253157278229. The next prime is 253157278267. The reversal of 253157278247 is 742872751352.

253157278247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 253157278247 - 2²⁰ = 253156229671 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 (253157278267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106154 + ... + 719432.

It is an arithmetic number, because the mean of its divisors is an integer number (63289576080).

Almost surely, 2^253157278247 is an apocalyptic number.

253157278247 is a deficient number, since it is larger than the sum of its proper divisors (1026073).

253157278247 is an equidigital number, since it uses as much as digits as its factorization.

253157278247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026072.

The product of its digits is 6585600, while the sum is 53.

The spelling of 253157278247 in words is "two hundred fifty-three billion, one hundred fifty-seven million, two hundred seventy-eight thousand, two hundred forty-seven".