231551542424215 has 64 divisors (see below), whose sum is σ = 318995979724800. Its totient is φ = 159929898246144.

The previous prime is 231551542424197. The next prime is 231551542424221. The reversal of 231551542424215 is 512424245155132.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-231551542424215 is a prime.

It is a super-2 number, since 2×231551542424215² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1429929244 + ... + 1430091166.

It is an arithmetic number, because the mean of its divisors is an integer number (4984312183200).

Almost surely, 2^{231551542424215} is an apocalyptic number.

231551542424215 is a deficient number, since it is larger than the sum of its proper divisors (87444437300585).

231551542424215 is a wasteful number, since it uses less digits than its factorization.

231551542424215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176696.

The product of its digits is 1920000, while the sum is 46.

Adding to 231551542424215 its reverse (512424245155132), we get a palindrome (743975787579347).

The spelling of 231551542424215 in words is "two hundred thirty-one trillion, five hundred fifty-one billion, five hundred forty-two million, four hundred twenty-four thousand, two hundred fifteen".