22251887 has 4 divisors (see below), whose sum is σ = 25430736. Its totient is φ = 19073040.

The previous prime is 22251881. The next prime is 22251899. The reversal of 22251887 is 78815222.

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

It is not a de Polignac number, because 22251887 - 2⁸ = 22251631 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 (22251881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1589414 + ... + 1589427.

It is an arithmetic number, because the mean of its divisors is an integer number (6357684).

Almost surely, 2^22251887 is an apocalyptic number.

22251887 is a deficient number, since it is larger than the sum of its proper divisors (3178849).

22251887 is an equidigital number, since it uses as much as digits as its factorization.

22251887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3178848.

The product of its digits is 17920, while the sum is 35.

The square root of 22251887 is about 4717.1905833875. The cubic root of 22251887 is about 281.2692673549.

The spelling of 22251887 in words is "twenty-two million, two hundred fifty-one thousand, eight hundred eighty-seven".