2015320550520 has 64 divisors (see below), whose sum is σ = 6046775763840. Its totient is φ = 537346448000.

The previous prime is 2015320550489. The next prime is 2015320550527. The reversal of 2015320550520 is 250550235102.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2015320550527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 232866 + ... + 2021105.

It is an arithmetic number, because the mean of its divisors is an integer number (94480871310).

Almost surely, 2^{2015320550520} is an apocalyptic number.

2015320550520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2015320550520 is an abundant number, since it is smaller than the sum of its proper divisors (4031455213320).

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

2015320550520 is a wasteful number, since it uses less digits than its factorization.

2015320550520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2261436 (or 2261432 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

Adding to 2015320550520 its reverse (250550235102), we get a palindrome (2265870785622).

The spelling of 2015320550520 in words is "two trillion, fifteen billion, three hundred twenty million, five hundred fifty thousand, five hundred twenty".