253113541421 has 4 divisors (see below), whose sum is σ = 272583813852. Its totient is φ = 233643268992.

The previous prime is 253113541391. The next prime is 253113541427. The reversal of 253113541421 is 124145311352.

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 161834025796 + 91279515625 = 402286^2 + 302125^2 .

It is a cyclic number.

It is not a de Polignac number, because 253113541421 - 2³⁰ = 252039799597 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 (253113541427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9735136196 + ... + 9735136221.

It is an arithmetic number, because the mean of its divisors is an integer number (68145953463).

Almost surely, 2^253113541421 is an apocalyptic number.

It is an amenable number.

253113541421 is a deficient number, since it is larger than the sum of its proper divisors (19470272431).

253113541421 is a wasteful number, since it uses less digits than its factorization.

253113541421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19470272430.

The product of its digits is 14400, while the sum is 32.

Adding to 253113541421 its reverse (124145311352), we get a palindrome (377258852773).

The spelling of 253113541421 in words is "two hundred fifty-three billion, one hundred thirteen million, five hundred forty-one thousand, four hundred twenty-one".