15522254521 has 4 divisors (see below), whose sum is σ = 15600256000. Its totient is φ = 15444253044.

The previous prime is 15522254519. The next prime is 15522254533. The reversal of 15522254521 is 12545222551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15522254521 - 2¹ = 15522254519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15522254551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39000441 + ... + 39000838.

It is an arithmetic number, because the mean of its divisors is an integer number (3900064000).

Almost surely, 2^15522254521 is an apocalyptic number.

It is an amenable number.

15522254521 is a deficient number, since it is larger than the sum of its proper divisors (78001479).

15522254521 is an equidigital number, since it uses as much as digits as its factorization.

15522254521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78001478.

The product of its digits is 40000, while the sum is 34.

The spelling of 15522254521 in words is "fifteen billion, five hundred twenty-two million, two hundred fifty-four thousand, five hundred twenty-one".