22239977 has 4 divisors (see below), whose sum is σ = 22713216. Its totient is φ = 21766740.

The previous prime is 22239967. The next prime is 22239979. The reversal of 22239977 is 77993222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 77993222 = 2 ⋅38996611.

It is a cyclic number.

It is not a de Polignac number, because 22239977 - 2¹⁶ = 22174441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22239979) 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, 236549 + ... + 236642.

It is an arithmetic number, because the mean of its divisors is an integer number (5678304).

Almost surely, 2^22239977 is an apocalyptic number.

It is an amenable number.

22239977 is a deficient number, since it is larger than the sum of its proper divisors (473239).

22239977 is an equidigital number, since it uses as much as digits as its factorization.

22239977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473238.

The product of its digits is 95256, while the sum is 41.

The square root of 22239977 is about 4715.9280104768. The cubic root of 22239977 is about 281.2190766330.

The spelling of 22239977 in words is "twenty-two million, two hundred thirty-nine thousand, nine hundred seventy-seven".