231225400 has 48 divisors (see below), whose sum is σ = 614402640. Its totient is φ = 79276800.

The previous prime is 231225377. The next prime is 231225419. The reversal of 231225400 is 4522132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81181 + ... + 83980.

It is an arithmetic number, because the mean of its divisors is an integer number (12800055).

Almost surely, 2^231225400 is an apocalyptic number.

231225400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231225400 is an abundant number, since it is smaller than the sum of its proper divisors (383177240).

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

231225400 is a wasteful number, since it uses less digits than its factorization.

231225400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165184 (or 165175 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 231225400 is about 15206.0974612160. The cubic root of 231225400 is about 613.7787472898.

Adding to 231225400 its reverse (4522132), we get a palindrome (235747532).

The spelling of 231225400 in words is "two hundred thirty-one million, two hundred twenty-five thousand, four hundred".