2217806972 has 12 divisors (see below), whose sum is σ = 3881687376. Its totient is φ = 1108753440.

The previous prime is 2217806971. The next prime is 2217807013. The reversal of 2217806972 is 2796087122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2217806971) 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, 113 + ... + 66600.

It is an arithmetic number, because the mean of its divisors is an integer number (323473948).

Almost surely, 2^2217806972 is an apocalyptic number.

It is an amenable number.

2217806972 is a deficient number, since it is larger than the sum of its proper divisors (1663880404).

2217806972 is a wasteful number, since it uses less digits than its factorization.

2217806972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75028 (or 75026 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 2217806972 is about 47093.5979937826. The cubic root of 2217806972 is about 1304.0910513599.

The spelling of 2217806972 in words is "two billion, two hundred seventeen million, eight hundred six thousand, nine hundred seventy-two".