231232130 has 16 divisors (see below), whose sum is σ = 440701560. Its totient is φ = 87052032.

The previous prime is 231232123. The next prime is 231232153. The reversal of 231232130 is 31232132.

It can be written as a sum of positive squares in 4 ways, for example, as 220136569 + 11095561 = 14837^2 + 3331^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a junction number, because it is equal to n+sod(n) for n = 231232099 and 231232108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 679925 + ... + 680264.

Almost surely, 2^231232130 is an apocalyptic number.

231232130 is a deficient number, since it is larger than the sum of its proper divisors (209469430).

231232130 is a wasteful number, since it uses less digits than its factorization.

231232130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360213.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 231232130 is about 15206.3187524134. The cubic root of 231232130 is about 613.7847020723.

Adding to 231232130 its reverse (31232132), we get a palindrome (262464262).

The spelling of 231232130 in words is "two hundred thirty-one million, two hundred thirty-two thousand, one hundred thirty".