22999905 has 12 divisors (see below), whose sum is σ = 39866580. Its totient is φ = 12266592.

The previous prime is 22999901. The next prime is 22999919. The reversal of 22999905 is 50999922.

It can be written as a sum of positive squares in 2 ways, for example, as 14653584 + 8346321 = 3828^2 + 2889^2 .

It is not a de Polignac number, because 22999905 - 2² = 22999901 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 511109 = 22999905 / (2 + 2 + 9 + 9 + 9 + 9 + 0 + 5).

It is not an unprimeable number, because it can be changed into a prime (22999901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 255510 + ... + 255599.

It is an arithmetic number, because the mean of its divisors is an integer number (3322215).

Almost surely, 2^22999905 is an apocalyptic number.

It is an amenable number.

22999905 is a deficient number, since it is larger than the sum of its proper divisors (16866675).

22999905 is a wasteful number, since it uses less digits than its factorization.

22999905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511120 (or 511117 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 45.

The square root of 22999905 is about 4795.8216188678. The cubic root of 22999905 is about 284.3863064377.

The spelling of 22999905 in words is "twenty-two million, nine hundred ninety-nine thousand, nine hundred five".