231513053553 has 16 divisors (see below), whose sum is σ = 343916872960. Its totient is φ = 153921478608.

The previous prime is 231513053533. The next prime is 231513053561. The reversal of 231513053553 is 355350315132.

231513053553 is a `hidden beast` number, since 2 + 3 + 1 + 51 + 3 + 0 + 53 + 553 = 666.

It is not a de Polignac number, because 231513053553 - 2⁹ = 231513053041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231513053533) 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, 11672050 + ... + 11691867.

It is an arithmetic number, because the mean of its divisors is an integer number (21494804560).

Almost surely, 2^231513053553 is an apocalyptic number.

It is an amenable number.

231513053553 is a deficient number, since it is larger than the sum of its proper divisors (112403819407).

231513053553 is a wasteful number, since it uses less digits than its factorization.

231513053553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23364293 (or 23364287 counting only the distinct ones).

The product of its (nonzero) digits is 101250, while the sum is 36.

Adding to 231513053553 its reverse (355350315132), we get a palindrome (586863368685).

The spelling of 231513053553 in words is "two hundred thirty-one billion, five hundred thirteen million, fifty-three thousand, five hundred fifty-three".