22251864 has 16 divisors (see below), whose sum is σ = 55629720. Its totient is φ = 7417280.

The previous prime is 22251863. The next prime is 22251877. The reversal of 22251864 is 46815222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22251863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 463557 + ... + 463604.

Almost surely, 2^22251864 is an apocalyptic number.

22251864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22251864 is an abundant number, since it is smaller than the sum of its proper divisors (33377856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22251864 is a wasteful number, since it uses less digits than its factorization.

22251864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927170 (or 927166 counting only the distinct ones).

The product of its digits is 7680, while the sum is 30.

The square root of 22251864 is about 4717.1881454952. The cubic root of 22251864 is about 281.2691704464.

The spelling of 22251864 in words is "twenty-two million, two hundred fifty-one thousand, eight hundred sixty-four".