231520130 has 48 divisors (see below), whose sum is σ = 447690240. Its totient is φ = 86167584.

The previous prime is 231520129. The next prime is 231520171. The reversal of 231520130 is 31025132.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 231520099 and 231520108.

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, 212447 + ... + 213533.

It is an arithmetic number, because the mean of its divisors is an integer number (9326880).

Almost surely, 2^231520130 is an apocalyptic number.

231520130 is a deficient number, since it is larger than the sum of its proper divisors (216170110).

231520130 is a wasteful number, since it uses less digits than its factorization.

231520130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1191 (or 1172 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 231520130 is about 15215.7855531681. The cubic root of 231520130 is about 614.0394196381.

Adding to 231520130 its reverse (31025132), we get a palindrome (262545262).

The spelling of 231520130 in words is "two hundred thirty-one million, five hundred twenty thousand, one hundred thirty".