122218538 has 16 divisors (see below), whose sum is σ = 199652040. Its totient is φ = 55773696.

The previous prime is 122218517. The next prime is 122218549. The reversal of 122218538 is 835812221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 21557449 + 100661089 = 4643^2 + 10033^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24095 + ... + 28722.

Almost surely, 2^122218538 is an apocalyptic number.

122218538 is a deficient number, since it is larger than the sum of its proper divisors (77433502).

122218538 is a wasteful number, since it uses less digits than its factorization.

122218538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52921.

The product of its digits is 7680, while the sum is 32.

The square root of 122218538 is about 11055.2493413762. The cubic root of 122218538 is about 496.2635311553.

The spelling of 122218538 in words is "one hundred twenty-two million, two hundred eighteen thousand, five hundred thirty-eight".