622522921 has 4 divisors (see below), whose sum is σ = 625003344. Its totient is φ = 620042500.

The previous prime is 622522919. The next prime is 622522937. The reversal of 622522921 is 129225226.

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 622522921 - 2¹ = 622522919 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (622522951) 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, 1239835 + ... + 1240336.

It is an arithmetic number, because the mean of its divisors is an integer number (156250836).

Almost surely, 2^622522921 is an apocalyptic number.

It is an amenable number.

622522921 is a deficient number, since it is larger than the sum of its proper divisors (2480423).

622522921 is a wasteful number, since it uses less digits than its factorization.

622522921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2480422.

The product of its digits is 8640, while the sum is 31.

The square root of 622522921 is about 24950.4092351208. The cubic root of 622522921 is about 853.8569456737.

The spelling of 622522921 in words is "six hundred twenty-two million, five hundred twenty-two thousand, nine hundred twenty-one".