231144144 has 80 divisors (see below), whose sum is σ = 744476160. Its totient is φ = 60036480.

The previous prime is 231144131. The next prime is 231144157. The reversal of 231144144 is 441441132.

It is an interprime number because it is at equal distance from previous prime (231144131) and next prime (231144157).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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, 27574 + ... + 34965.

It is an arithmetic number, because the mean of its divisors is an integer number (9305952).

Almost surely, 2^231144144 is an apocalyptic number.

231144144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

231144144 is an abundant number, since it is smaller than the sum of its proper divisors (513332016).

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

231144144 is a wasteful number, since it uses less digits than its factorization.

231144144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62568 (or 62562 counting only the distinct ones).

The product of its digits is 1536, while the sum is 24.

The square root of 231144144 is about 15203.4254035069. The cubic root of 231144144 is about 613.7068419122.

Adding to 231144144 its reverse (441441132), we get a palindrome (672585276).

The spelling of 231144144 in words is "two hundred thirty-one million, one hundred forty-four thousand, one hundred forty-four".