31404051 has 32 divisors (see below), whose sum is σ = 54272000. Its totient is φ = 17939880.

The previous prime is 31404047. The next prime is 31404059. The reversal of 31404051 is 15040413.

It is a happy number.

It is not a de Polignac number, because 31404051 - 2² = 31404047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31404059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7566 + ... + 10956.

It is an arithmetic number, because the mean of its divisors is an integer number (1696000).

Almost surely, 2^31404051 is an apocalyptic number.

31404051 is a deficient number, since it is larger than the sum of its proper divisors (22867949).

31404051 is an equidigital number, since it uses as much as digits as its factorization.

31404051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3421 (or 3401 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 31404051 is about 5603.9317447663. The cubic root of 31404051 is about 315.4969932312.

Adding to 31404051 its reverse (15040413), we get a palindrome (46444464).

The spelling of 31404051 in words is "thirty-one million, four hundred four thousand, fifty-one".