22955621 has 4 divisors (see below), whose sum is σ = 24721452. Its totient is φ = 21189792.

The previous prime is 22955609. The next prime is 22955657. The reversal of 22955621 is 12655922.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9523396 + 13432225 = 3086^2 + 3665^2 .

It is not a de Polignac number, because 22955621 - 2¹⁰ = 22954597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22955521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 882896 + ... + 882921.

It is an arithmetic number, because the mean of its divisors is an integer number (6180363).

Almost surely, 2^22955621 is an apocalyptic number.

It is an amenable number.

22955621 is a deficient number, since it is larger than the sum of its proper divisors (1765831).

22955621 is a wasteful number, since it uses less digits than its factorization.

22955621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1765830.

The product of its digits is 10800, while the sum is 32.

The square root of 22955621 is about 4791.2024586736. The cubic root of 22955621 is about 284.2036701105.

The spelling of 22955621 in words is "twenty-two million, nine hundred fifty-five thousand, six hundred twenty-one".