2217758972 has 96 divisors (see below), whose sum is σ = 4739524608. Its totient is φ = 894240000.

The previous prime is 2217758957. The next prime is 2217758981. The reversal of 2217758972 is 2798577122.

It is a self number, because there is not a number n which added to its sum of digits gives 2217758972.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3209147 + ... + 3209837.

It is an arithmetic number, because the mean of its divisors is an integer number (49370048).

Almost surely, 2^2217758972 is an apocalyptic number.

2217758972 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2217758972 is an abundant number, since it is smaller than the sum of its proper divisors (2521765636).

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

2217758972 is a wasteful number, since it uses less digits than its factorization.

2217758972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931 (or 929 counting only the distinct ones).

The product of its digits is 987840, while the sum is 50.

The square root of 2217758972 is about 47093.0883676151. The cubic root of 2217758972 is about 1304.0816431437.

The spelling of 2217758972 in words is "two billion, two hundred seventeen million, seven hundred fifty-eight thousand, nine hundred seventy-two".