2015530420 has 12 divisors (see below), whose sum is σ = 4232613924. Its totient is φ = 806212160.

The previous prime is 2015530399. The next prime is 2015530453. The reversal of 2015530420 is 240355102.

It can be written as a sum of positive squares in 2 ways, for example, as 1574026276 + 441504144 = 39674^2 + 21012^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2015530391 and 2015530400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50388241 + ... + 50388280.

It is an arithmetic number, because the mean of its divisors is an integer number (352717827).

Almost surely, 2^2015530420 is an apocalyptic number.

2015530420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2015530420 is an abundant number, since it is smaller than the sum of its proper divisors (2217083504).

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

2015530420 is a wasteful number, since it uses less digits than its factorization.

2015530420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100776530 (or 100776528 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 2015530420 is about 44894.6591478318. The cubic root of 2015530420 is about 1263.1738287092.

Adding to 2015530420 its reverse (240355102), we get a palindrome (2255885522).

The spelling of 2015530420 in words is "two billion, fifteen million, five hundred thirty thousand, four hundred twenty".