22088621 has 4 divisors (see below), whose sum is σ = 23251200. Its totient is φ = 20926044.

The previous prime is 22088611. The next prime is 22088641. The reversal of 22088621 is 12688022.

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 22088621 - 2⁶ = 22088557 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 (22088611) 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, 581261 + ... + 581298.

It is an arithmetic number, because the mean of its divisors is an integer number (5812800).

Almost surely, 2^22088621 is an apocalyptic number.

It is an amenable number.

22088621 is a deficient number, since it is larger than the sum of its proper divisors (1162579).

22088621 is a wasteful number, since it uses less digits than its factorization.

22088621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162578.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 22088621 is about 4699.8532955827. The cubic root of 22088621 is about 280.5796707058.

The spelling of 22088621 in words is "twenty-two million, eighty-eight thousand, six hundred twenty-one".