231604501 has 4 divisors (see below), whose sum is σ = 231635404. Its totient is φ = 231573600.

The previous prime is 231604489. The next prime is 231604517. The reversal of 231604501 is 105406132.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 126562500 + 105042001 = 11250^2 + 10249^2 .

It is a cyclic number.

It is not a de Polignac number, because 231604501 - 2¹⁵ = 231571733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231604591) 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, 3721 + ... + 21841.

It is an arithmetic number, because the mean of its divisors is an integer number (57908851).

Almost surely, 2^231604501 is an apocalyptic number.

It is an amenable number.

231604501 is a deficient number, since it is larger than the sum of its proper divisors (30903).

231604501 is a wasteful number, since it uses less digits than its factorization.

231604501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30902.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 231604501 is about 15218.5577831804. The cubic root of 231604501 is about 614.1140003782.

The spelling of 231604501 in words is "two hundred thirty-one million, six hundred four thousand, five hundred one".