231139980 has 120 divisors (see below), whose sum is σ = 737296560. Its totient is φ = 60600960.

The previous prime is 231139957. The next prime is 231140023. The reversal of 231139980 is 89931132.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 97651 + ... + 99989.

It is an arithmetic number, because the mean of its divisors is an integer number (6144138).

Almost surely, 2^231139980 is an apocalyptic number.

231139980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231139980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (368648280).

231139980 is an abundant number, since it is smaller than the sum of its proper divisors (506156580).

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

231139980 is a wasteful number, since it uses less digits than its factorization.

231139980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2421 (or 2410 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 231139980 is about 15203.2884600668. The cubic root of 231139980 is about 613.7031566352.

The spelling of 231139980 in words is "two hundred thirty-one million, one hundred thirty-nine thousand, nine hundred eighty".