2222715621 has 32 divisors (see below), whose sum is σ = 3465619456. Its totient is φ = 1240920000.

The previous prime is 2222715617. The next prime is 2222715641. The reversal of 2222715621 is 1265172222.

It is not a de Polignac number, because 2222715621 - 2² = 2222715617 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 (2222715641) 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, 187686 + ... + 199176.

It is an arithmetic number, because the mean of its divisors is an integer number (108300608).

Almost surely, 2^2222715621 is an apocalyptic number.

2222715621 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2222715621 is a deficient number, since it is larger than the sum of its proper divisors (1242903835).

2222715621 is a wasteful number, since it uses less digits than its factorization.

2222715621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11713.

The product of its digits is 6720, while the sum is 30.

The square root of 2222715621 is about 47145.6850729735. The cubic root of 2222715621 is about 1305.0524527881.

Adding to 2222715621 its reverse (1265172222), we get a palindrome (3487887843).

The spelling of 2222715621 in words is "two billion, two hundred twenty-two million, seven hundred fifteen thousand, six hundred twenty-one".