231217980 has 48 divisors (see below), whose sum is σ = 739898880. Its totient is φ = 52849728.

The previous prime is 231217967. The next prime is 231217993. The reversal of 231217980 is 89712132.

231217980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (231217967) and next prime (231217993).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274840 + ... + 275679.

It is an arithmetic number, because the mean of its divisors is an integer number (15414560).

Almost surely, 2^231217980 is an apocalyptic number.

231217980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231217980 is an abundant number, since it is smaller than the sum of its proper divisors (508680900).

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

231217980 is a wasteful number, since it uses less digits than its factorization.

231217980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550538 (or 550536 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 231217980 is about 15205.8534781840. The cubic root of 231217980 is about 613.7721818534.

The spelling of 231217980 in words is "two hundred thirty-one million, two hundred seventeen thousand, nine hundred eighty".