403131604 has 6 divisors (see below), whose sum is σ = 705480314. Its totient is φ = 201565800.

The previous prime is 403131593. The next prime is 403131611. The reversal of 403131604 is 406131304.

It can be written as a sum of positive squares in only one way, i.e., 264127504 + 139004100 = 16252^2 + 11790^2 .

It is a super-2 number, since 2×403131604² = 325030180287225632, which contains 22 as substring.

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, 50391447 + ... + 50391454.

Almost surely, 2^403131604 is an apocalyptic number.

It is an amenable number.

403131604 is a deficient number, since it is larger than the sum of its proper divisors (302348710).

403131604 is a wasteful number, since it uses less digits than its factorization.

403131604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100782905 (or 100782903 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 403131604 is about 20078.1374634203. The cubic root of 403131604 is about 738.7241248072.

Adding to 403131604 its reverse (406131304), we get a palindrome (809262908).

The spelling of 403131604 in words is "four hundred three million, one hundred thirty-one thousand, six hundred four".