22551985 has 4 divisors (see below), whose sum is σ = 27062388. Its totient is φ = 18041584.

The previous prime is 22551961. The next prime is 22552037. The reversal of 22551985 is 58915522.

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 10608049 + 11943936 = 3257^2 + 3456^2 .

It is a cyclic number.

It is not a de Polignac number, because 22551985 - 2¹³ = 22543793 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2255194 + ... + 2255203.

It is an arithmetic number, because the mean of its divisors is an integer number (6765597).

Almost surely, 2^22551985 is an apocalyptic number.

It is an amenable number.

22551985 is a deficient number, since it is larger than the sum of its proper divisors (4510403).

22551985 is an equidigital number, since it uses as much as digits as its factorization.

22551985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4510402.

The product of its digits is 36000, while the sum is 37.

The square root of 22551985 is about 4748.8930289068. The cubic root of 22551985 is about 282.5280625789.

The spelling of 22551985 in words is "twenty-two million, five hundred fifty-one thousand, nine hundred eighty-five".