31422899 has 4 divisors (see below), whose sum is σ = 32789136. Its totient is φ = 30056664.

The previous prime is 31422893. The next prime is 31422901. The reversal of 31422899 is 99822413.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31422899 - 2⁴ = 31422883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31422893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 683084 + ... + 683129.

It is an arithmetic number, because the mean of its divisors is an integer number (8197284).

Almost surely, 2^31422899 is an apocalyptic number.

31422899 is a deficient number, since it is larger than the sum of its proper divisors (1366237).

31422899 is a wasteful number, since it uses less digits than its factorization.

31422899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366236.

The product of its digits is 31104, while the sum is 38.

The square root of 31422899 is about 5605.6131689584. The cubic root of 31422899 is about 315.5600986575.

The spelling of 31422899 in words is "thirty-one million, four hundred twenty-two thousand, eight hundred ninety-nine".