2215031240 has 32 divisors (see below), whose sum is σ = 4994672760. Its totient is φ = 884083200.

The previous prime is 2215031227. The next prime is 2215031249. The reversal of 2215031240 is 421305122.

It can be written as a sum of positive squares in 4 ways, for example, as 1862267716 + 352763524 = 43154^2 + 18782^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (2215031249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41621 + ... + 78500.

Almost surely, 2^2215031240 is an apocalyptic number.

2215031240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2215031240 is an abundant number, since it is smaller than the sum of its proper divisors (2779641520).

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

2215031240 is a wasteful number, since it uses less digits than its factorization.

2215031240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120593 (or 120589 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 2215031240 is about 47064.1183918280. The cubic root of 2215031240 is about 1303.5467721836.

Adding to 2215031240 its reverse (421305122), we get a palindrome (2636336362).

The spelling of 2215031240 in words is "two billion, two hundred fifteen million, thirty-one thousand, two hundred forty".