31404065 has 16 divisors (see below), whose sum is σ = 46984320. Its totient is φ = 19576320.

The previous prime is 31404059. The next prime is 31404077. The reversal of 31404065 is 56040413.

It is a happy number.

It is not a de Polignac number, because 31404065 - 2¹⁸ = 31141921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31404065.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40400 + ... + 41169.

It is an arithmetic number, because the mean of its divisors is an integer number (2936520).

Almost surely, 2^31404065 is an apocalyptic number.

31404065 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31404065 is a deficient number, since it is larger than the sum of its proper divisors (15580255).

31404065 is a wasteful number, since it uses less digits than its factorization.

31404065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81592.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 31404065 is about 5603.9329938892. The cubic root of 31404065 is about 315.4970401143.

Adding to 31404065 its reverse (56040413), we get a palindrome (87444478).

The spelling of 31404065 in words is "thirty-one million, four hundred four thousand, sixty-five".