15225320220 has 48 divisors (see below), whose sum is σ = 46506434688. Its totient is φ = 3690986560.

The previous prime is 15225320213. The next prime is 15225320237. The reversal of 15225320220 is 2202352251.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11533674 + ... + 11534993.

It is an arithmetic number, because the mean of its divisors is an integer number (968884056).

Almost surely, 2^15225320220 is an apocalyptic number.

15225320220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15225320220 is an abundant number, since it is smaller than the sum of its proper divisors (31281114468).

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

15225320220 is a wasteful number, since it uses less digits than its factorization.

15225320220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23068690 (or 23068688 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

Adding to 15225320220 its reverse (2202352251), we get a palindrome (17427672471).

The spelling of 15225320220 in words is "fifteen billion, two hundred twenty-five million, three hundred twenty thousand, two hundred twenty".