231551542252442 has 24 divisors (see below), whose sum is σ = 369378954238140. Its totient is φ = 108841747604480.

The previous prime is 231551542252333. The next prime is 231551542252483. The reversal of 231551542252442 is 244252245155132.

It can be written as a sum of positive squares in 6 ways, for example, as 202234309669921 + 29317232582521 = 14220911^2 + 5414539^2 .

It is a super-2 number, since 2×231551542252442² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

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, 226850717 + ... + 227869152.

Almost surely, 2^{231551542252442} is an apocalyptic number.

231551542252442 is a deficient number, since it is larger than the sum of its proper divisors (137827411985698).

231551542252442 is a wasteful number, since it uses less digits than its factorization.

231551542252442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454720786 (or 454720769 counting only the distinct ones).

The product of its digits is 3840000, while the sum is 47.

The spelling of 231551542252442 in words is "two hundred thirty-one trillion, five hundred fifty-one billion, five hundred forty-two million, two hundred fifty-two thousand, four hundred forty-two".