864214181 has 4 divisors (see below), whose sum is σ = 894014700. Its totient is φ = 834413664.

The previous prime is 864214171. The next prime is 864214199. The reversal of 864214181 is 181412468.

It is a happy number.

864214181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 575520100 + 288694081 = 23990^2 + 16991^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-864214181 is a prime.

It is a super-2 number, since 2×864214181² = 1493732301283001522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864214151) 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, 14900216 + ... + 14900273.

It is an arithmetic number, because the mean of its divisors is an integer number (223503675).

Almost surely, 2^864214181 is an apocalyptic number.

It is an amenable number.

864214181 is a deficient number, since it is larger than the sum of its proper divisors (29800519).

864214181 is a wasteful number, since it uses less digits than its factorization.

864214181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29800518.

The product of its digits is 12288, while the sum is 35.

The square root of 864214181 is about 29397.5199804337. The cubic root of 864214181 is about 952.5193263324.

The spelling of 864214181 in words is "eight hundred sixty-four million, two hundred fourteen thousand, one hundred eighty-one".