231445944 has 96 divisors (see below), whose sum is σ = 655635600. Its totient is φ = 75643200.

The previous prime is 231445891. The next prime is 231445961. The reversal of 231445944 is 449544132.

231445944 is a `hidden beast` number, since 23 + 1 + 44 + 594 + 4 = 666.

It is a super-2 number, since 2×231445944² = 107134449988102272, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 231445899 and 231445908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2246997 + ... + 2247099.

Almost surely, 2^231445944 is an apocalyptic number.

231445944 is a gapful number since it is divisible by the number (24) 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 231445944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (327817800).

231445944 is an abundant number, since it is smaller than the sum of its proper divisors (424189656).

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

231445944 is a wasteful number, since it uses less digits than its factorization.

231445944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322 (or 209 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 231445944 is about 15213.3475606127. The cubic root of 231445944 is about 613.9738270770.

The spelling of 231445944 in words is "two hundred thirty-one million, four hundred forty-five thousand, nine hundred forty-four".