8618181 has 16 divisors (see below), whose sum is σ = 13500480. Its totient is φ = 4821120.

The previous prime is 8618173. The next prime is 8618213. The reversal of 8618181 is 1818168.

It is not a de Polignac number, because 8618181 - 2³ = 8618173 is a prime.

It is a super-2 number, since 2×8618181² = 148546087497522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

8618181 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8618131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9616 + ... + 10473.

It is an arithmetic number, because the mean of its divisors is an integer number (843780).

Almost surely, 2^8618181 is an apocalyptic number.

It is an amenable number.

8618181 is a deficient number, since it is larger than the sum of its proper divisors (4882299).

8618181 is a wasteful number, since it uses less digits than its factorization.

8618181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20116.

The product of its digits is 3072, while the sum is 33.

The square root of 8618181 is about 2935.6738579072. The cubic root of 8618181 is about 205.0242366744.

The spelling of 8618181 in words is "eight million, six hundred eighteen thousand, one hundred eighty-one".