15222646021 has 8 divisors (see below), whose sum is σ = 16725996000. Its totient is φ = 13739208240.

The previous prime is 15222646013. The next prime is 15222646057. The reversal of 15222646021 is 12064622251.

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 15222646021 - 2³ = 15222646013 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 (15222643021) 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, 4976446 + ... + 4979503.

It is an arithmetic number, because the mean of its divisors is an integer number (2090749500).

Almost surely, 2^15222646021 is an apocalyptic number.

15222646021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15222646021 is a deficient number, since it is larger than the sum of its proper divisors (1503349979).

15222646021 is a wasteful number, since it uses less digits than its factorization.

15222646021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9956099.

The product of its (nonzero) digits is 11520, while the sum is 31.

The spelling of 15222646021 in words is "fifteen billion, two hundred twenty-two million, six hundred forty-six thousand, twenty-one".