622484021 has 4 divisors (see below), whose sum is σ = 622635852. Its totient is φ = 622332192.

The previous prime is 622483997. The next prime is 622484033. The reversal of 622484021 is 120484226.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 453093796 + 169390225 = 21286^2 + 13015^2 .

It is a cyclic number.

It is not a de Polignac number, because 622484021 - 2⁶ = 622483957 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 (622484081) 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, 69590 + ... + 78023.

It is an arithmetic number, because the mean of its divisors is an integer number (155658963).

Almost surely, 2^622484021 is an apocalyptic number.

It is an amenable number.

622484021 is a deficient number, since it is larger than the sum of its proper divisors (151831).

622484021 is a wasteful number, since it uses less digits than its factorization.

622484021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151830.

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 622484021 is about 24949.6296766104. The cubic root of 622484021 is about 853.8391601293.

The spelling of 622484021 in words is "six hundred twenty-two million, four hundred eighty-four thousand, twenty-one".