2215530540 has 72 divisors (see below), whose sum is σ = 6820784880. Its totient is φ = 581986944.

The previous prime is 2215530529. The next prime is 2215530619. The reversal of 2215530540 is 450355122.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79795 + ... + 103914.

Almost surely, 2^2215530540 is an apocalyptic number.

2215530540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2215530540 is an abundant number, since it is smaller than the sum of its proper divisors (4605254340).

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

2215530540 is a wasteful number, since it uses less digits than its factorization.

2215530540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183791 (or 183786 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 2215530540 is about 47069.4225585995. The cubic root of 2215530540 is about 1303.6447109083.

Adding to 2215530540 its reverse (450355122), we get a palindrome (2665885662).

The spelling of 2215530540 in words is "two billion, two hundred fifteen million, five hundred thirty thousand, five hundred forty".