22971399 has 16 divisors (see below), whose sum is σ = 35172480. Its totient is φ = 13188960.

The previous prime is 22971373. The next prime is 22971407. The reversal of 22971399 is 99317922.

It is a happy number.

It is not a de Polignac number, because 22971399 - 2⁵ = 22971367 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22971399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22971349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17692 + ... + 18945.

It is an arithmetic number, because the mean of its divisors is an integer number (2198280).

Almost surely, 2^22971399 is an apocalyptic number.

22971399 is a deficient number, since it is larger than the sum of its proper divisors (12201081).

22971399 is a wasteful number, since it uses less digits than its factorization.

22971399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36670.

The product of its digits is 61236, while the sum is 42.

The square root of 22971399 is about 4792.8487353556. The cubic root of 22971399 is about 284.2687687420.

The spelling of 22971399 in words is "twenty-two million, nine hundred seventy-one thousand, three hundred ninety-nine".