231231880 has 128 divisors (see below), whose sum is σ = 602277120. Its totient is φ = 79073280.

The previous prime is 231231863. The next prime is 231231901. The reversal of 231231880 is 88132132.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 738604 + ... + 738916.

It is an arithmetic number, because the mean of its divisors is an integer number (4705290).

Almost surely, 2^231231880 is an apocalyptic number.

231231880 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 231231880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301138560).

231231880 is an abundant number, since it is smaller than the sum of its proper divisors (371045240).

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

231231880 is a wasteful number, since it uses less digits than its factorization.

231231880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431 (or 427 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 231231880 is about 15206.3105321442. The cubic root of 231231880 is about 613.7844808715.

The spelling of 231231880 in words is "two hundred thirty-one million, two hundred thirty-one thousand, eight hundred eighty".