231403604 has 6 divisors (see below), whose sum is σ = 404956314. Its totient is φ = 115701800.

The previous prime is 231403577. The next prime is 231403619. The reversal of 231403604 is 406304132.

It is a happy number.

231403604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 124322500 + 107081104 = 11150^2 + 10348^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 231403604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28925447 + ... + 28925454.

It is an arithmetic number, because the mean of its divisors is an integer number (67492719).

Almost surely, 2^231403604 is an apocalyptic number.

It is an amenable number.

231403604 is a deficient number, since it is larger than the sum of its proper divisors (173552710).

231403604 is a wasteful number, since it uses less digits than its factorization.

231403604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57850905 (or 57850903 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 231403604 is about 15211.9559557606. The cubic root of 231403604 is about 613.9363853074.

Adding to 231403604 its reverse (406304132), we get a palindrome (637707736).

The spelling of 231403604 in words is "two hundred thirty-one million, four hundred three thousand, six hundred four".