231532130 has 16 divisors (see below), whose sum is σ = 418876920. Its totient is φ = 92141952.

The previous prime is 231532127. The next prime is 231532153. The reversal of 231532130 is 31235132.

It can be written as a sum of positive squares in 4 ways, for example, as 228402769 + 3129361 = 15113^2 + 1769^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56795 + ... + 60734.

Almost surely, 2^231532130 is an apocalyptic number.

231532130 is a deficient number, since it is larger than the sum of its proper divisors (187344790).

231532130 is a wasteful number, since it uses less digits than its factorization.

231532130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117733.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 231532130 is about 15216.1798753827. The cubic root of 231532130 is about 614.0500282847.

Adding to 231532130 its reverse (31235132), we get a palindrome (262767262).

The spelling of 231532130 in words is "two hundred thirty-one million, five hundred thirty-two thousand, one hundred thirty".