231320450 has 24 divisors (see below), whose sum is σ = 444138240. Its totient is φ = 89542800.

The previous prime is 231320449. The next prime is 231320471. The reversal of 231320450 is 54023132.

It is a happy number.

231320450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 73070 + ... + 76169.

It is an arithmetic number, because the mean of its divisors is an integer number (18505760).

Almost surely, 2^231320450 is an apocalyptic number.

231320450 is a deficient number, since it is larger than the sum of its proper divisors (212817790).

231320450 is a wasteful number, since it uses less digits than its factorization.

231320450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149282 (or 149277 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 231320450 is about 15209.2225310829. Note that the first 3 decimals coincide. The cubic root of 231320450 is about 613.8628379331.

Adding to 231320450 its reverse (54023132), we get a palindrome (285343582).

The spelling of 231320450 in words is "two hundred thirty-one million, three hundred twenty thousand, four hundred fifty".