231145604 has 12 divisors (see below), whose sum is σ = 405707484. Its totient is φ = 115229184.

The previous prime is 231145601. The next prime is 231145609. The reversal of 231145604 is 406541132.

It can be written as a sum of positive squares in 2 ways, for example, as 46240000 + 184905604 = 6800^2 + 13598^2 .

It is not an unprimeable number, because it can be changed into a prime (231145601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84389 + ... + 87084.

It is an arithmetic number, because the mean of its divisors is an integer number (33808957).

Almost surely, 2^231145604 is an apocalyptic number.

It is an amenable number.

231145604 is a deficient number, since it is larger than the sum of its proper divisors (174561880).

231145604 is a wasteful number, since it uses less digits than its factorization.

231145604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171814 (or 171812 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 231145604 is about 15203.4734189263. The cubic root of 231145604 is about 613.7081340498.

Adding to 231145604 its reverse (406541132), we get a palindrome (637686736).

The spelling of 231145604 in words is "two hundred thirty-one million, one hundred forty-five thousand, six hundred four".