231545352452553 has 16 divisors (see below), whose sum is σ = 343030597242240. Its totient is φ = 154363367844432.

The previous prime is 231545352452543. The next prime is 231545352452597. The reversal of 231545352452553 is 355254253545132.

231545352452553 is a `hidden beast` number, since 2 + 3 + 1 + 5 + 4 + 5 + 35 + 2 + 4 + 52 + 553 = 666.

It is not a de Polignac number, because 231545352452553 - 2⁴ = 231545352452537 is a prime.

It is a super-2 number, since 2×231545352452553² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231545352452553.

It is not an unprimeable number, because it can be changed into a prime (231545352452543) 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, 17318700 + ... + 27622962.

It is an arithmetic number, because the mean of its divisors is an integer number (21439412327640).

Almost surely, 2^{231545352452553} is an apocalyptic number.

It is an amenable number.

231545352452553 is a deficient number, since it is larger than the sum of its proper divisors (111485244789687).

231545352452553 is a wasteful number, since it uses less digits than its factorization.

231545352452553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11136525 (or 11136519 counting only the distinct ones).

The product of its digits is 54000000, while the sum is 54.

The spelling of 231545352452553 in words is "two hundred thirty-one trillion, five hundred forty-five billion, three hundred fifty-two million, four hundred fifty-two thousand, five hundred fifty-three".