105752721218 has 8 divisors (see below), whose sum is σ = 159505486140. Its totient is φ = 52584225840.

The previous prime is 105752721209. The next prime is 105752721227. The reversal of 105752721218 is 812127257501.

It is an interprime number because it is at equal distance from previous prime (105752721209) and next prime (105752721227).

It can be written as a sum of positive squares in 2 ways, for example, as 61232987209 + 44519734009 = 247453^2 + 210997^2 .

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

It is a super-2 number, since 2×105752721218² (a number of 23 digits) contains 22 as substring.

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, 146066933 + ... + 146067656.

Almost surely, 2^105752721218 is an apocalyptic number.

105752721218 is a deficient number, since it is larger than the sum of its proper divisors (53752764922).

105752721218 is a wasteful number, since it uses less digits than its factorization.

105752721218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292134772.

The product of its (nonzero) digits is 78400, while the sum is 41.

Adding to 105752721218 its reverse (812127257501), we get a palindrome (917879978719).

The spelling of 105752721218 in words is "one hundred five billion, seven hundred fifty-two million, seven hundred twenty-one thousand, two hundred eighteen".