401131604 has 6 divisors (see below), whose sum is σ = 701980314. Its totient is φ = 200565800.

The previous prime is 401131573. The next prime is 401131607. The reversal of 401131604 is 406131104.

It can be written as a sum of positive squares in only one way, i.e., 223442704 + 177688900 = 14948^2 + 13330^2 .

It is a super-2 number, since 2×401131604² = 321813127455225632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401131607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50141447 + ... + 50141454.

It is an arithmetic number, because the mean of its divisors is an integer number (116996719).

Almost surely, 2^401131604 is an apocalyptic number.

It is an amenable number.

401131604 is a deficient number, since it is larger than the sum of its proper divisors (300848710).

401131604 is a wasteful number, since it uses less digits than its factorization.

401131604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100282905 (or 100282903 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 401131604 is about 20028.2701200079. The cubic root of 401131604 is about 737.5004563437.

Adding to 401131604 its reverse (406131104), we get a palindrome (807262708).

The spelling of 401131604 in words is "four hundred one million, one hundred thirty-one thousand, six hundred four".