15222020544 has 84 divisors (see below), whose sum is σ = 45927584040. Its totient is φ = 4806950400.

The previous prime is 15222020531. The next prime is 15222020549. The reversal of 15222020544 is 44502022251.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15222020549) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 684507 + ... + 706394.

Almost surely, 2^15222020544 is an apocalyptic number.

It is an amenable number.

15222020544 is an abundant number, since it is smaller than the sum of its proper divisors (30705563496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15222020544 is a wasteful number, since it uses less digits than its factorization.

15222020544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390938 (or 1390925 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

Adding to 15222020544 its reverse (44502022251), we get a palindrome (59724042795).

The spelling of 15222020544 in words is "fifteen billion, two hundred twenty-two million, twenty thousand, five hundred forty-four".