15055220 has 24 divisors (see below), whose sum is σ = 33280800. Its totient is φ = 5704992.

The previous prime is 15055213. The next prime is 15055237. The reversal of 15055220 is 2255051.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 15055192 and 15055201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19430 + ... + 20189.

It is an arithmetic number, because the mean of its divisors is an integer number (1386700).

Almost surely, 2^15055220 is an apocalyptic number.

15055220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15055220 is an abundant number, since it is smaller than the sum of its proper divisors (18225580).

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

15055220 is a wasteful number, since it uses less digits than its factorization.

15055220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39647 (or 39645 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 15055220 is about 3880.1056686642. The cubic root of 15055220 is about 246.9234684519.

The spelling of 15055220 in words is "fifteen million, fifty-five thousand, two hundred twenty".