231249999980 has 24 divisors (see below), whose sum is σ = 485636670288. Its totient is φ = 92497777088.

The previous prime is 231249999977. The next prime is 231249999983. The reversal of 231249999980 is 89999942132.

It is an interprime number because it is at equal distance from previous prime (231249999977) and next prime (231249999983).

It is not an unprimeable number, because it can be changed into a prime (231249999983) 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, 905687 + ... + 1132593.

It is an arithmetic number, because the mean of its divisors is an integer number (20234861262).

Almost surely, 2^231249999980 is an apocalyptic number.

231249999980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231249999980 is an abundant number, since it is smaller than the sum of its proper divisors (254386670308).

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

231249999980 is a wasteful number, since it uses less digits than its factorization.

231249999980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277873 (or 277871 counting only the distinct ones).

The product of its (nonzero) digits is 22674816, while the sum is 65.

The spelling of 231249999980 in words is "two hundred thirty-one billion, two hundred forty-nine million, nine hundred ninety-nine thousand, nine hundred eighty".