31421204 has 6 divisors (see below), whose sum is σ = 54987114. Its totient is φ = 15710600.

The previous prime is 31421189. The next prime is 31421213. The reversal of 31421204 is 40212413.

It can be written as a sum of positive squares in only one way, i.e., 25908100 + 5513104 = 5090^2 + 2348^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3927647 + ... + 3927654.

It is an arithmetic number, because the mean of its divisors is an integer number (9164519).

Almost surely, 2^31421204 is an apocalyptic number.

It is an amenable number.

31421204 is a deficient number, since it is larger than the sum of its proper divisors (23565910).

31421204 is a wasteful number, since it uses less digits than its factorization.

31421204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7855305 (or 7855303 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 31421204 is about 5605.4619791771. The cubic root of 31421204 is about 315.5544246214.

Adding to 31421204 its reverse (40212413), we get a palindrome (71633617).

The spelling of 31421204 in words is "thirty-one million, four hundred twenty-one thousand, two hundred four".