22387641 has 4 divisors (see below), whose sum is σ = 29850192. Its totient is φ = 14925092.

The previous prime is 22387633. The next prime is 22387661. The reversal of 22387641 is 14678322.

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.

It is a cyclic number.

It is not a de Polignac number, because 22387641 - 2³ = 22387633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22387661) 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, 3731271 + ... + 3731276.

It is an arithmetic number, because the mean of its divisors is an integer number (7462548).

Almost surely, 2^22387641 is an apocalyptic number.

22387641 is the 2993-rd centered pentagonal number.

It is an amenable number.

22387641 is a deficient number, since it is larger than the sum of its proper divisors (7462551).

22387641 is an equidigital number, since it uses as much as digits as its factorization.

22387641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7462550.

The product of its digits is 16128, while the sum is 33.

The square root of 22387641 is about 4731.5579886545. The cubic root of 22387641 is about 281.8400959562.

The spelling of 22387641 in words is "twenty-two million, three hundred eighty-seven thousand, six hundred forty-one".