52161218 has 8 divisors (see below), whose sum is σ = 78309180. Its totient is φ = 26058160.

The previous prime is 52161203. The next prime is 52161233. The reversal of 52161218 is 81216125.

It is an interprime number because it is at equal distance from previous prime (52161203) and next prime (52161233).

It can be written as a sum of positive squares in 2 ways, for example, as 33953929 + 18207289 = 5827^2 + 4267^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between odd and even.

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, 8153 + ... + 13068.

Almost surely, 2^52161218 is an apocalyptic number.

52161218 is a deficient number, since it is larger than the sum of its proper divisors (26147962).

52161218 is a wasteful number, since it uses less digits than its factorization.

52161218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22452.

The product of its digits is 960, while the sum is 26.

The square root of 52161218 is about 7222.2723570909. The cubic root of 52161218 is about 373.6364536156.

The spelling of 52161218 in words is "fifty-two million, one hundred sixty-one thousand, two hundred eighteen".