231291500190 has 16 divisors (see below), whose sum is σ = 555099600528. Its totient is φ = 61677733376.

The previous prime is 231291500183. The next prime is 231291500197. The reversal of 231291500190 is 91005192132.

It is an interprime number because it is at equal distance from previous prime (231291500183) and next prime (231291500197).

It is a super-2 number, since 2×231291500190² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231291500197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3854858307 + ... + 3854858366.

It is an arithmetic number, because the mean of its divisors is an integer number (34693725033).

Almost surely, 2^231291500190 is an apocalyptic number.

231291500190 is an abundant number, since it is smaller than the sum of its proper divisors (323808100338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231291500190 is a wasteful number, since it uses less digits than its factorization.

231291500190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7709716683.

The product of its (nonzero) digits is 4860, while the sum is 33.

The spelling of 231291500190 in words is "two hundred thirty-one billion, two hundred ninety-one million, five hundred thousand, one hundred ninety".