31125404 has 12 divisors (see below), whose sum is σ = 54553128. Its totient is φ = 15538800.

The previous prime is 31125403. The next prime is 31125427. The reversal of 31125404 is 40452113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31125403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2867 + ... + 8394.

It is an arithmetic number, because the mean of its divisors is an integer number (4546094).

Almost surely, 2^31125404 is an apocalyptic number.

It is an amenable number.

31125404 is a deficient number, since it is larger than the sum of its proper divisors (23427724).

31125404 is a wasteful number, since it uses less digits than its factorization.

31125404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11956 (or 11954 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 31125404 is about 5579.0146083336. The cubic root of 31125404 is about 314.5610885586.

Adding to 31125404 its reverse (40452113), we get a palindrome (71577517).

The spelling of 31125404 in words is "thirty-one million, one hundred twenty-five thousand, four hundred four".