231961488 has 80 divisors (see below), whose sum is σ = 676296000. Its totient is φ = 67863040.

The previous prime is 231961469. The next prime is 231961507. The reversal of 231961488 is 884169132.

It is an interprime number because it is at equal distance from previous prime (231961469) and next prime (231961507).

It is a super-2 number, since 2×231961488² = 107612263830348288, which contains 22 as substring.

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, 7738 + ... + 22886.

It is an arithmetic number, because the mean of its divisors is an integer number (8453700).

Almost surely, 2^231961488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231961488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (338148000).

231961488 is an abundant number, since it is smaller than the sum of its proper divisors (444334512).

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

231961488 is a wasteful number, since it uses less digits than its factorization.

231961488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15200 (or 15194 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 231961488 is about 15230.2819409228. The cubic root of 231961488 is about 614.4293629494.

The spelling of 231961488 in words is "two hundred thirty-one million, nine hundred sixty-one thousand, four hundred eighty-eight".