2415561220 has 12 divisors (see below), whose sum is σ = 5072678604. Its totient is φ = 966224480.

The previous prime is 2415561157. The next prime is 2415561227. The reversal of 2415561220 is 221655142.

It can be written as a sum of positive squares in 2 ways, for example, as 1619418564 + 796142656 = 40242^2 + 28216^2 .

It is not an unprimeable number, because it can be changed into a prime (2415561227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60389011 + ... + 60389050.

It is an arithmetic number, because the mean of its divisors is an integer number (422723217).

Almost surely, 2^2415561220 is an apocalyptic number.

2415561220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2415561220 is an abundant number, since it is smaller than the sum of its proper divisors (2657117384).

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

2415561220 is a wasteful number, since it uses less digits than its factorization.

2415561220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120778070 (or 120778068 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 2415561220 is about 49148.3592808549. The cubic root of 2415561220 is about 1341.7533334102.

The spelling of 2415561220 in words is "two billion, four hundred fifteen million, five hundred sixty-one thousand, two hundred twenty".