253631621133 has 48 divisors (see below), whose sum is σ = 402989064192. Its totient is φ = 152437572000.

The previous prime is 253631621093. The next prime is 253631621143. The reversal of 253631621133 is 331126136352.

253631621133 is a `hidden beast` number, since 2 + 5 + 3 + 631 + 6 + 2 + 1 + 13 + 3 = 666.

It is not a de Polignac number, because 253631621133 - 2⁹ = 253631620621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253631621143) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51433678 + ... + 51438608.

It is an arithmetic number, because the mean of its divisors is an integer number (8395605504).

Almost surely, 2^253631621133 is an apocalyptic number.

It is an amenable number.

253631621133 is a deficient number, since it is larger than the sum of its proper divisors (149357443059).

253631621133 is a wasteful number, since it uses less digits than its factorization.

253631621133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9166 (or 9163 counting only the distinct ones).

The product of its digits is 58320, while the sum is 36.

Adding to 253631621133 its reverse (331126136352), we get a palindrome (584757757485).

The spelling of 253631621133 in words is "two hundred fifty-three billion, six hundred thirty-one million, six hundred twenty-one thousand, one hundred thirty-three".