22817961 has 24 divisors (see below), whose sum is σ = 35085960. Its totient is φ = 14240256.

The previous prime is 22817959. The next prime is 22818049. The reversal of 22817961 is 16971822.

It can be written as a sum of positive squares in 4 ways, for example, as 15848361 + 6969600 = 3981^2 + 2640^2 .

It is not a de Polignac number, because 22817961 - 2¹ = 22817959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22817911) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44575 + ... + 45083.

It is an arithmetic number, because the mean of its divisors is an integer number (1461915).

Almost surely, 2^22817961 is an apocalyptic number.

It is an amenable number.

22817961 is a deficient number, since it is larger than the sum of its proper divisors (12267999).

22817961 is a wasteful number, since it uses less digits than its factorization.

22817961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825 (or 822 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 22817961 is about 4776.8149430347. The cubic root of 22817961 is about 283.6344276305.

The spelling of 22817961 in words is "twenty-two million, eight hundred seventeen thousand, nine hundred sixty-one".