7222220621 has 16 divisors (see below), whose sum is σ = 9156948480. Its totient is φ = 5532316080.

The previous prime is 7222220611. The next prime is 7222220627. The reversal of 7222220621 is 1260222227.

It is a cyclic number.

It is not a de Polignac number, because 7222220621 - 2⁶ = 7222220557 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 (7222220627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 790331 + ... + 799416.

It is an arithmetic number, because the mean of its divisors is an integer number (572309280).

Almost surely, 2^7222220621 is an apocalyptic number.

It is an amenable number.

7222220621 is a deficient number, since it is larger than the sum of its proper divisors (1934727859).

7222220621 is a wasteful number, since it uses less digits than its factorization.

7222220621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589824.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 7222220621 is about 84983.6491391138. The cubic root of 7222220621 is about 1932.9631896987.

Adding to 7222220621 its reverse (1260222227), we get a palindrome (8482442848).

It can be divided in two parts, 72222206 and 21, that added together give a palindrome (72222227).

The spelling of 7222220621 in words is "seven billion, two hundred twenty-two million, two hundred twenty thousand, six hundred twenty-one".