31404025 has 6 divisors (see below), whose sum is σ = 38941022. Its totient is φ = 25123200.

The previous prime is 31404011. The next prime is 31404047. The reversal of 31404025 is 52040413.

It can be written as a sum of positive squares in 3 ways, for example, as 278784 + 31125241 = 528^2 + 5579^2 .

It is not a de Polignac number, because 31404025 - 2¹⁵ = 31371257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31403993 and 31404011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 628056 + ... + 628105.

Almost surely, 2^31404025 is an apocalyptic number.

It is an amenable number.

31404025 is a deficient number, since it is larger than the sum of its proper divisors (7536997).

31404025 is a wasteful number, since it uses less digits than its factorization.

31404025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256171 (or 1256166 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 31404025 is about 5603.9294249660. The cubic root of 31404025 is about 315.4969061625.

Adding to 31404025 its reverse (52040413), we get a palindrome (83444438).

The spelling of 31404025 in words is "thirty-one million, four hundred four thousand, twenty-five".