231451164 has 72 divisors (see below), whose sum is σ = 672628320. Its totient is φ = 65734272.

The previous prime is 231451153. The next prime is 231451189. The reversal of 231451164 is 461154132.

It is a happy number.

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, 40942 + ... + 46250.

It is an arithmetic number, because the mean of its divisors is an integer number (9342060).

Almost surely, 2^231451164 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 231451164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (336314160).

231451164 is an abundant number, since it is smaller than the sum of its proper divisors (441177156).

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

231451164 is a wasteful number, since it uses less digits than its factorization.

231451164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5499 (or 5494 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 231451164 is about 15213.5191195200. The cubic root of 231451164 is about 613.9784428694.

The spelling of 231451164 in words is "two hundred thirty-one million, four hundred fifty-one thousand, one hundred sixty-four".