231193980 has 48 divisors (see below), whose sum is σ = 719271840. Its totient is φ = 61651584.

The previous prime is 231193969. The next prime is 231194009. The reversal of 231193980 is 89391132.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213529 + ... + 214608.

It is an arithmetic number, because the mean of its divisors is an integer number (14984830).

Almost surely, 2^231193980 is an apocalyptic number.

231193980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231193980 is an abundant number, since it is smaller than the sum of its proper divisors (488077860).

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

231193980 is a wasteful number, since it uses less digits than its factorization.

231193980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428155 (or 428147 counting only the distinct ones).

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

The square root of 231193980 is about 15205.0642879272. The cubic root of 231193980 is about 613.7509449783.

The spelling of 231193980 in words is "two hundred thirty-one million, one hundred ninety-three thousand, nine hundred eighty".