231772944 has 160 divisors (see below), whose sum is σ = 688705920. Its totient is φ = 66576384.

The previous prime is 231772939. The next prime is 231772949. The reversal of 231772944 is 449277132.

It is an interprime number because it is at equal distance from previous prime (231772939) and next prime (231772949).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (231772949) by changing a digit.

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, 1339642 + ... + 1339814.

It is an arithmetic number, because the mean of its divisors is an integer number (4304412).

Almost surely, 2^231772944 is an apocalyptic number.

231772944 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 231772944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (344352960).

231772944 is an abundant number, since it is smaller than the sum of its proper divisors (456932976).

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

231772944 is a wasteful number, since it uses less digits than its factorization.

231772944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329 (or 323 counting only the distinct ones).

The product of its digits is 84672, while the sum is 39.

The square root of 231772944 is about 15224.0909088195. The cubic root of 231772944 is about 614.2628433938.

The spelling of 231772944 in words is "two hundred thirty-one million, seven hundred seventy-two thousand, nine hundred forty-four".