231613604 has 48 divisors (see below), whose sum is σ = 432598320. Its totient is φ = 108326400.

The previous prime is 231613589. The next prime is 231613631. The reversal of 231613604 is 406316132.

It can be written as a sum of positive squares in 8 ways, for example, as 42276004 + 189337600 = 6502^2 + 13760^2 .

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 15 ways as a sum of consecutive naturals, for example, 620762 + ... + 621134.

It is an arithmetic number, because the mean of its divisors is an integer number (9012465).

Almost surely, 2^231613604 is an apocalyptic number.

It is an amenable number.

231613604 is a deficient number, since it is larger than the sum of its proper divisors (200984716).

231613604 is a wasteful number, since it uses less digits than its factorization.

231613604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560 (or 558 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 231613604 is about 15218.8568558877. The cubic root of 231613604 is about 614.1220459998.

Adding to 231613604 its reverse (406316132), we get a palindrome (637929736).

The spelling of 231613604 in words is "two hundred thirty-one million, six hundred thirteen thousand, six hundred four".