2217145738 has 12 divisors (see below), whose sum is σ = 3359660598. Its totient is φ = 1097265600.

The previous prime is 2217145727. The next prime is 2217145753. The reversal of 2217145738 is 8375417122.

It can be written as a sum of positive squares in 3 ways, for example, as 1869957049 + 347188689 = 43243^2 + 18633^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2217145738.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 667570 + ... + 670882.

Almost surely, 2^2217145738 is an apocalyptic number.

2217145738 is a deficient number, since it is larger than the sum of its proper divisors (1142514860).

2217145738 is an frugal number, since it uses more digits than its factorization.

2217145738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6729 (or 3416 counting only the distinct ones).

The product of its digits is 94080, while the sum is 40.

The square root of 2217145738 is about 47086.5770469674. The cubic root of 2217145738 is about 1303.9614345709.

The spelling of 2217145738 in words is "two billion, two hundred seventeen million, one hundred forty-five thousand, seven hundred thirty-eight".