15535500220 has 24 divisors (see below), whose sum is σ = 32634100800. Its totient is φ = 6212380992.

The previous prime is 15535500161. The next prime is 15535500221. The reversal of 15535500220 is 2200553551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15535500221) 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, 42580 + ... + 181339.

It is an arithmetic number, because the mean of its divisors is an integer number (1359754200).

Almost surely, 2^15535500220 is an apocalyptic number.

15535500220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15535500220 is an abundant number, since it is smaller than the sum of its proper divisors (17098600580).

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

15535500220 is a wasteful number, since it uses less digits than its factorization.

15535500220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227397 (or 227395 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 28.

The spelling of 15535500220 in words is "fifteen billion, five hundred thirty-five million, five hundred thousand, two hundred twenty".