231620980 has 12 divisors (see below), whose sum is σ = 486404100. Its totient is φ = 92648384.

The previous prime is 231620951. The next prime is 231620989. The reversal of 231620980 is 89026132.

231620980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 127825636 + 103795344 = 11306^2 + 10188^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231620989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5790505 + ... + 5790544.

It is an arithmetic number, because the mean of its divisors is an integer number (40533675).

Almost surely, 2^231620980 is an apocalyptic number.

231620980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231620980 is an abundant number, since it is smaller than the sum of its proper divisors (254783120).

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

231620980 is a wasteful number, since it uses less digits than its factorization.

231620980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11581058 (or 11581056 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 231620980 is about 15219.0991849058. The cubic root of 231620980 is about 614.1285650701.

The spelling of 231620980 in words is "two hundred thirty-one million, six hundred twenty thousand, nine hundred eighty".