253531233531 has 12 divisors (see below), whose sum is σ = 366216243120. Its totient is φ = 169018763280.

The previous prime is 253531233511. The next prime is 253531233601. The reversal of 253531233531 is 135332135352.

It is a happy number.

253531233531 is a `hidden beast` number, since 2 + 5 + 3 + 5 + 312 + 335 + 3 + 1 = 666.

It is not a de Polignac number, because 253531233531 - 2⁵ = 253531233499 is a prime.

It is a super-2 number, since 2×253531233531² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (253531233511) 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 11 ways as a sum of consecutive naturals, for example, 1119565 + ... + 1326833.

It is an arithmetic number, because the mean of its divisors is an integer number (30518020260).

Almost surely, 2^253531233531 is an apocalyptic number.

253531233531 is a deficient number, since it is larger than the sum of its proper divisors (112685009589).

253531233531 is a wasteful number, since it uses less digits than its factorization.

253531233531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343186 (or 343183 counting only the distinct ones).

The product of its digits is 121500, while the sum is 36.

Adding to 253531233531 its reverse (135332135352), we get a palindrome (388863368883).

It can be divided in two parts, 25353 and 1233531, that added together give a square (1258884 = 1122²).

The spelling of 253531233531 in words is "two hundred fifty-three billion, five hundred thirty-one million, two hundred thirty-three thousand, five hundred thirty-one".