231881472 has 108 divisors (see below), whose sum is σ = 703892280. Its totient is φ = 73211904.

The previous prime is 231881471. The next prime is 231881483. The reversal of 231881472 is 274188132.

231881472 is a `hidden beast` number, since 2 + 3 + 188 + 1 + 472 = 666.

231881472 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (231881471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41128 + ... + 46424.

Almost surely, 2^231881472 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 231881472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (351946140).

231881472 is an abundant number, since it is smaller than the sum of its proper divisors (472010808).

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

231881472 is a wasteful number, since it uses less digits than its factorization.

231881472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5338 (or 5321 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 231881472 is about 15227.6548424240. The cubic root of 231881472 is about 614.3587049068.

The spelling of 231881472 in words is "two hundred thirty-one million, eight hundred eighty-one thousand, four hundred seventy-two".