22044487 has 4 divisors (see below), whose sum is σ = 22246840. Its totient is φ = 21842136.

The previous prime is 22044481. The next prime is 22044493. The reversal of 22044487 is 78444022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78444022 = 2 ⋅39222011.

It is an interprime number because it is at equal distance from previous prime (22044481) and next prime (22044493).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22044487 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 (22044481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101013 + ... + 101230.

It is an arithmetic number, because the mean of its divisors is an integer number (5561710).

Almost surely, 2^22044487 is an apocalyptic number.

22044487 is a deficient number, since it is larger than the sum of its proper divisors (202353).

22044487 is a wasteful number, since it uses less digits than its factorization.

22044487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202352.

The product of its (nonzero) digits is 14336, while the sum is 31.

The square root of 22044487 is about 4695.1556949690. The cubic root of 22044487 is about 280.3926760887.

The spelling of 22044487 in words is "twenty-two million, forty-four thousand, four hundred eighty-seven".