2015520 has 192 divisors, whose sum is σ = 7620480. Its totient is φ = 442368.

The previous prime is 2015509. The next prime is 2015543. The reversal of 2015520 is 255102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2015520.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106071 + ... + 106089.

It is an arithmetic number, because the mean of its divisors is an integer number (39690).

2^2015520 is an apocalyptic number.

2015520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2015520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3810240).

2015520 is an abundant number, since it is smaller than the sum of its proper divisors (5604960).

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

2015520 is a wasteful number, since it uses less digits than its factorization.

2015520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 2015520 is about 1419.6901070304. The cubic root of 2015520 is about 126.3171651897.

The spelling of 2015520 in words is "two million, fifteen thousand, five hundred twenty".