22208887 has 4 divisors (see below), whose sum is σ = 22258800. Its totient is φ = 22158976.

The previous prime is 22208833. The next prime is 22208903. The reversal of 22208887 is 78880222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78880222 = 2 ⋅39440111.

It is a cyclic number.

It is not a de Polignac number, because 22208887 - 2⁷ = 22208759 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 (22200887) 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, 24283 + ... + 25180.

It is an arithmetic number, because the mean of its divisors is an integer number (5564700).

Almost surely, 2^22208887 is an apocalyptic number.

22208887 is a deficient number, since it is larger than the sum of its proper divisors (49913).

22208887 is an equidigital number, since it uses as much as digits as its factorization.

22208887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49912.

The product of its (nonzero) digits is 28672, while the sum is 37.

The square root of 22208887 is about 4712.6305817452. The cubic root of 22208887 is about 281.0879737044.

The spelling of 22208887 in words is "twenty-two million, two hundred eight thousand, eight hundred eighty-seven".