238512998831 has 4 divisors (see below), whose sum is σ = 238909859664. Its totient is φ = 238116138000.

The previous prime is 238512998719. The next prime is 238512998837. The reversal of 238512998831 is 138899215832.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 238512998831 - 2³⁰ = 237439257007 is a prime.

It is a super-2 number, since 2×238512998831² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238512998837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198429515 + ... + 198430716.

It is an arithmetic number, because the mean of its divisors is an integer number (59727464916).

Almost surely, 2^238512998831 is an apocalyptic number.

238512998831 is a deficient number, since it is larger than the sum of its proper divisors (396860833).

238512998831 is an equidigital number, since it uses as much as digits as its factorization.

238512998831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396860832.

The product of its digits is 7464960, while the sum is 59.

The spelling of 238512998831 in words is "two hundred thirty-eight billion, five hundred twelve million, nine hundred ninety-eight thousand, eight hundred thirty-one".