22199977 has 4 divisors (see below), whose sum is σ = 23505876. Its totient is φ = 20894080.

The previous prime is 22199971. The next prime is 22200001. The reversal of 22199977 is 77999122.

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 16192576 + 6007401 = 4024^2 + 2451^2 .

It is a cyclic number.

It is not a de Polignac number, because 22199977 - 2¹⁵ = 22167209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22199971) 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, 652924 + ... + 652957.

It is an arithmetic number, because the mean of its divisors is an integer number (5876469).

Almost surely, 2^22199977 is an apocalyptic number.

It is an amenable number.

22199977 is a deficient number, since it is larger than the sum of its proper divisors (1305899).

22199977 is a wasteful number, since it uses less digits than its factorization.

22199977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305898.

The product of its digits is 142884, while the sum is 46.

The square root of 22199977 is about 4711.6851550162. The cubic root of 22199977 is about 281.0503787115.

The spelling of 22199977 in words is "twenty-two million, one hundred ninety-nine thousand, nine hundred seventy-seven".