2015505620 has 12 divisors (see below), whose sum is σ = 4232561844. Its totient is φ = 806202240.

The previous prime is 2015505619. The next prime is 2015505623. The reversal of 2015505620 is 265055102.

It can be written as a sum of positive squares in 2 ways, for example, as 390931984 + 1624573636 = 19772^2 + 40306^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2015505620.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2015505623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50387621 + ... + 50387660.

It is an arithmetic number, because the mean of its divisors is an integer number (352713487).

Almost surely, 2^2015505620 is an apocalyptic number.

2015505620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2015505620 is an abundant number, since it is smaller than the sum of its proper divisors (2217056224).

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

2015505620 is a wasteful number, since it uses less digits than its factorization.

2015505620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100775290 (or 100775288 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 2015505620 is about 44894.3829448629. The cubic root of 2015505620 is about 1263.1686478002.

The spelling of 2015505620 in words is "two billion, fifteen million, five hundred five thousand, six hundred twenty".