5622021721 has 32 divisors (see below), whose sum is σ = 6205248000. Its totient is φ = 5077163520.

The previous prime is 5622021679. The next prime is 5622021733. The reversal of 5622021721 is 1271202265.

It is not a de Polignac number, because 5622021721 - 2²⁵ = 5588467289 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5622021721.

It is not an unprimeable number, because it can be changed into a prime (5622028721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9385380 + ... + 9385978.

It is an arithmetic number, because the mean of its divisors is an integer number (193914000).

Almost surely, 2^5622021721 is an apocalyptic number.

It is an amenable number.

5622021721 is a deficient number, since it is larger than the sum of its proper divisors (583226279).

5622021721 is a wasteful number, since it uses less digits than its factorization.

5622021721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 5622021721 is about 74980.1421777793. The cubic root of 5622021721 is about 1778.1327177021.

Adding to 5622021721 its reverse (1271202265), we get a palindrome (6893223986).

The spelling of 5622021721 in words is "five billion, six hundred twenty-two million, twenty-one thousand, seven hundred twenty-one".