231319980 has 36 divisors (see below), whose sum is σ = 701671152. Its totient is φ = 61685280.

The previous prime is 231319973. The next prime is 231319987. The reversal of 231319980 is 89913132.

It is an interprime number because it is at equal distance from previous prime (231319973) and next prime (231319987).

It is a tau number, because it is divible by the number of its divisors (36).

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

It is not an unprimeable number, because it can be changed into a prime (231319987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 642376 + ... + 642735.

Almost surely, 2^231319980 is an apocalyptic number.

231319980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231319980 is an abundant number, since it is smaller than the sum of its proper divisors (470351172).

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

231319980 is a wasteful number, since it uses less digits than its factorization.

231319980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285126 (or 1285121 counting only the distinct ones).

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

The square root of 231319980 is about 15209.2070799237. The cubic root of 231319980 is about 613.8624221812.

The spelling of 231319980 in words is "two hundred thirty-one million, three hundred nineteen thousand, nine hundred eighty".