2195615520 has 648 divisors, whose sum is σ = 9270683604. Its totient is φ = 471453696.

The previous prime is 2195615473. The next prime is 2195615531. The reversal of 2195615520 is 255165912.

2195615520 is a `hidden beast` number, since 2 + 19 + 5 + 615 + 5 + 20 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 1486565136 + 709050384 = 38556^2 + 26628^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 59340942 + ... + 59340978.

Almost surely, 2^2195615520 is an apocalyptic number.

2195615520 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 2195615520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4635341802).

2195615520 is an abundant number, since it is smaller than the sum of its proper divisors (7075068084).

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

2195615520 is a wasteful number, since it uses less digits than its factorization.

2195615520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 2195615520 is about 46857.3955742314. The cubic root of 2195615520 is about 1299.7268696410.

The spelling of 2195615520 in words is "two billion, one hundred ninety-five million, six hundred fifteen thousand, five hundred twenty".