2215052440 has 16 divisors (see below), whose sum is σ = 4983868080. Its totient is φ = 886020960.

The previous prime is 2215052423. The next prime is 2215052443. The reversal of 2215052440 is 442505122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215052443) 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, 27688116 + ... + 27688195.

It is an arithmetic number, because the mean of its divisors is an integer number (311491755).

Almost surely, 2^2215052440 is an apocalyptic number.

2215052440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2215052440 is an abundant number, since it is smaller than the sum of its proper divisors (2768815640).

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

2215052440 is a wasteful number, since it uses less digits than its factorization.

2215052440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55376322 (or 55376318 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 2215052440 is about 47064.3436159477. The cubic root of 2215052440 is about 1303.5509309065.

Adding to 2215052440 its reverse (442505122), we get a palindrome (2657557562).

The spelling of 2215052440 in words is "two billion, two hundred fifteen million, fifty-two thousand, four hundred forty".