22661613 has 20 divisors (see below), whose sum is σ = 36458268. Its totient is φ = 13944960.

The previous prime is 22661603. The next prime is 22661633. The reversal of 22661613 is 31616622.

It can be written as a sum of positive squares in 2 ways, for example, as 7193124 + 15468489 = 2682^2 + 3933^2 .

It is not a de Polignac number, because 22661613 - 2¹⁴ = 22645229 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22661603) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9708 + ... + 11813.

Almost surely, 2^22661613 is an apocalyptic number.

It is an amenable number.

22661613 is a deficient number, since it is larger than the sum of its proper divisors (13796655).

22661613 is a wasteful number, since it uses less digits than its factorization.

22661613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21546 (or 21537 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 22661613 is about 4760.4215149501. The cubic root of 22661613 is about 282.9851241000.

The spelling of 22661613 in words is "twenty-two million, six hundred sixty-one thousand, six hundred thirteen".