231512450 has 24 divisors (see below), whose sum is σ = 463738548. Its totient is φ = 85481280.

The previous prime is 231512431. The next prime is 231512453. The reversal of 231512450 is 54215132.

It can be written as a sum of positive squares in 6 ways, for example, as 53743561 + 177768889 = 7331^2 + 13333^2 .

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (231512453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 177437 + ... + 178736.

Almost surely, 2^231512450 is an apocalyptic number.

231512450 is an abundant number, since it is smaller than the sum of its proper divisors (232226098).

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

231512450 is a wasteful number, since it uses less digits than its factorization.

231512450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356198 (or 356193 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 231512450 is about 15215.5331815878. The cubic root of 231512450 is about 614.0326299119.

Adding to 231512450 its reverse (54215132), we get a palindrome (285727582).

The spelling of 231512450 in words is "two hundred thirty-one million, five hundred twelve thousand, four hundred fifty".