2215140440 has 32 divisors (see below), whose sum is σ = 5012891280. Its totient is φ = 880931712.

The previous prime is 2215140413. The next prime is 2215140449. The reversal of 2215140440 is 440415122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215140449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153134 + ... + 166973.

Almost surely, 2^2215140440 is an apocalyptic number.

2215140440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2215140440 is an abundant number, since it is smaller than the sum of its proper divisors (2797750840).

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

2215140440 is a wasteful number, since it uses less digits than its factorization.

2215140440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320291 (or 320287 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 2215140440 is about 47065.2784969982. The cubic root of 2215140440 is about 1303.5681932461.

Adding to 2215140440 its reverse (440415122), we get a palindrome (2655555562).

The spelling of 2215140440 in words is "two billion, two hundred fifteen million, one hundred forty thousand, four hundred forty".