31422399 has 16 divisors (see below), whose sum is σ = 43960320. Its totient is φ = 19937120.

The previous prime is 31422373. The next prime is 31422401. The reversal of 31422399 is 99322413.

It is a cyclic number.

It is not a de Polignac number, because 31422399 - 2¹⁶ = 31356863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31424399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3634 + ... + 8720.

It is an arithmetic number, because the mean of its divisors is an integer number (2747520).

Almost surely, 2^31422399 is an apocalyptic number.

31422399 is a deficient number, since it is larger than the sum of its proper divisors (12537921).

31422399 is a wasteful number, since it uses less digits than its factorization.

31422399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5190.

The product of its digits is 11664, while the sum is 33.

The square root of 31422399 is about 5605.5685706269. The cubic root of 31422399 is about 315.5584249217.

The spelling of 31422399 in words is "thirty-one million, four hundred twenty-two thousand, three hundred ninety-nine".