22202455621 has 8 divisors (see below), whose sum is σ = 22629496824. Its totient is φ = 21775715520.

The previous prime is 22202455603. The next prime is 22202455633. The reversal of 22202455621 is 12655420222.

It can be written as a sum of positive squares in 4 ways, for example, as 4548018721 + 17654436900 = 67439^2 + 132870^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22202455621 - 2¹⁷ = 22202324549 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 (22202455321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76531 + ... + 224191.

It is an arithmetic number, because the mean of its divisors is an integer number (2828687103).

Almost surely, 2^22202455621 is an apocalyptic number.

It is an amenable number.

22202455621 is a deficient number, since it is larger than the sum of its proper divisors (427041203).

22202455621 is a wasteful number, since it uses less digits than its factorization.

22202455621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150551.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 22202455621 its reverse (12655420222), we get a palindrome (34857875843).

The spelling of 22202455621 in words is "twenty-two billion, two hundred two million, four hundred fifty-five thousand, six hundred twenty-one".