31421799 has 6 divisors (see below), whose sum is σ = 45387056. Its totient is φ = 20947860.

The previous prime is 31421783. The next prime is 31421813. The reversal of 31421799 is 99712413.

It is not a de Polignac number, because 31421799 - 2⁴ = 31421783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31421759) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1745647 + ... + 1745664.

Almost surely, 2^31421799 is an apocalyptic number.

31421799 is a deficient number, since it is larger than the sum of its proper divisors (13965257).

31421799 is a wasteful number, since it uses less digits than its factorization.

31421799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3491317 (or 3491314 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 31421799 is about 5605.5150521607. The cubic root of 31421799 is about 315.5564164154.

The spelling of 31421799 in words is "thirty-one million, four hundred twenty-one thousand, seven hundred ninety-nine".