253453431321 has 16 divisors (see below), whose sum is σ = 375495616320. Its totient is φ = 168964881120.

The previous prime is 253453431229. The next prime is 253453431323. The reversal of 253453431321 is 123134354352.

253453431321 is a `hidden beast` number, since 2 + 534 + 53 + 43 + 1 + 32 + 1 = 666.

It is not a de Polignac number, because 253453431321 - 2¹⁵ = 253453398553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (253453431323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1391466 + ... + 1563036.

It is an arithmetic number, because the mean of its divisors is an integer number (23468476020).

Almost surely, 2^253453431321 is an apocalyptic number.

It is an amenable number.

253453431321 is a deficient number, since it is larger than the sum of its proper divisors (122042184999).

253453431321 is a wasteful number, since it uses less digits than its factorization.

253453431321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226293 (or 226287 counting only the distinct ones).

The product of its digits is 129600, while the sum is 36.

Adding to 253453431321 its reverse (123134354352), we get a palindrome (376587785673).

The spelling of 253453431321 in words is "two hundred fifty-three billion, four hundred fifty-three million, four hundred thirty-one thousand, three hundred twenty-one".