231100402 has 24 divisors (see below), whose sum is σ = 376326324. Its totient is φ = 106389504.

The previous prime is 231100369. The next prime is 231100403. The reversal of 231100402 is 204001132.

It can be written as a sum of positive squares in 6 ways, for example, as 75325041 + 155775361 = 8679^2 + 12481^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (231100403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 199858 + ... + 201010.

Almost surely, 2^231100402 is an apocalyptic number.

231100402 is a deficient number, since it is larger than the sum of its proper divisors (145225922).

231100402 is a wasteful number, since it uses less digits than its factorization.

231100402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774 (or 1761 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 231100402 is about 15201.9867780498. The cubic root of 231100402 is about 613.6681265926.

Adding to 231100402 its reverse (204001132), we get a palindrome (435101534).

The spelling of 231100402 in words is "two hundred thirty-one million, one hundred thousand, four hundred two".