22355230621 has 4 divisors (see below), whose sum is σ = 22355855200. Its totient is φ = 22354606044.

The previous prime is 22355230589. The next prime is 22355230657. The reversal of 22355230621 is 12603255322.

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 22355230621 - 2⁵ = 22355230589 is a prime.

It is a super-2 number, since 2×22355230621² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22355230021) 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, 255111 + ... + 331348.

It is an arithmetic number, because the mean of its divisors is an integer number (5588963800).

Almost surely, 2^22355230621 is an apocalyptic number.

It is an amenable number.

22355230621 is a deficient number, since it is larger than the sum of its proper divisors (624579).

22355230621 is an equidigital number, since it uses as much as digits as its factorization.

22355230621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624578.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 22355230621 its reverse (12603255322), we get a palindrome (34958485943).

The spelling of 22355230621 in words is "twenty-two billion, three hundred fifty-five million, two hundred thirty thousand, six hundred twenty-one".