231130402 has 16 divisors (see below), whose sum is σ = 386411040. Its totient is φ = 103042368.

The previous prime is 231130397. The next prime is 231130423. The reversal of 231130402 is 204031132.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 178248 + ... + 179539.

It is an arithmetic number, because the mean of its divisors is an integer number (24150690).

Almost surely, 2^231130402 is an apocalyptic number.

231130402 is a deficient number, since it is larger than the sum of its proper divisors (155280638).

231130402 is a wasteful number, since it uses less digits than its factorization.

231130402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357825.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 231130402 is about 15202.9734591625. The cubic root of 231130402 is about 613.6946796219.

Adding to 231130402 its reverse (204031132), we get a palindrome (435161534).

The spelling of 231130402 in words is "two hundred thirty-one million, one hundred thirty thousand, four hundred two".