21222564619 has 8 divisors (see below), whose sum is σ = 21381248000. Its totient is φ = 21063967272.

The previous prime is 21222564613. The next prime is 21222564637. The reversal of 21222564619 is 91646522212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21222564619 - 2³ = 21222564611 is a prime.

It is a super-2 number, since 2×21222564619² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222564611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 525262 + ... + 564220.

It is an arithmetic number, because the mean of its divisors is an integer number (2672656000).

Almost surely, 2^21222564619 is an apocalyptic number.

21222564619 is a deficient number, since it is larger than the sum of its proper divisors (158683381).

21222564619 is a wasteful number, since it uses less digits than its factorization.

21222564619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43017.

The product of its digits is 103680, while the sum is 40.

The spelling of 21222564619 in words is "twenty-one billion, two hundred twenty-two million, five hundred sixty-four thousand, six hundred nineteen".