2215391840 has 24 divisors (see below), whose sum is σ = 5233863600. Its totient is φ = 886156672.

The previous prime is 2215391821. The next prime is 2215391861. The reversal of 2215391840 is 481935122.

It is a super-2 number, since 2×2215391840² = 9815922009477171200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2215391840.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6922940 + ... + 6923259.

It is an arithmetic number, because the mean of its divisors is an integer number (218077650).

Almost surely, 2^2215391840 is an apocalyptic number.

2215391840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2215391840 is an abundant number, since it is smaller than the sum of its proper divisors (3018471760).

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

2215391840 is a wasteful number, since it uses less digits than its factorization.

2215391840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13846214 (or 13846206 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 2215391840 is about 47067.9491798825. The cubic root of 2215391840 is about 1303.6175060934.

The spelling of 2215391840 in words is "two billion, two hundred fifteen million, three hundred ninety-one thousand, eight hundred forty".