231601304 has 16 divisors (see below), whose sum is σ = 473730120. Its totient is φ = 105273280.

The previous prime is 231601303. The next prime is 231601309. The reversal of 231601304 is 403106132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231601303) 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, 1315829 + ... + 1316004.

Almost surely, 2^231601304 is an apocalyptic number.

It is an amenable number.

231601304 is an abundant number, since it is smaller than the sum of its proper divisors (242128816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231601304 is a wasteful number, since it uses less digits than its factorization.

231601304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2631850 (or 2631846 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 231601304 is about 15218.4527465837. The cubic root of 231601304 is about 614.1111746825. Note that the first 4 decimals are identical.

Adding to 231601304 its reverse (403106132), we get a palindrome (634707436).

The spelling of 231601304 in words is "two hundred thirty-one million, six hundred one thousand, three hundred four".