6623181 has 32 divisors (see below), whose sum is σ = 10429440. Its totient is φ = 4147200.

The previous prime is 6623173. The next prime is 6623203. The reversal of 6623181 is 1813266.

It is not a de Polignac number, because 6623181 - 2³ = 6623173 is a prime.

It is a super-2 number, since 2×6623181² = 87733053117522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6623101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34221 + ... + 34413.

It is an arithmetic number, because the mean of its divisors is an integer number (325920).

Almost surely, 2^6623181 is an apocalyptic number.

It is an amenable number.

6623181 is a deficient number, since it is larger than the sum of its proper divisors (3806259).

6623181 is a wasteful number, since it uses less digits than its factorization.

6623181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 268 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 6623181 is about 2573.5541571920. The cubic root of 6623181 is about 187.7970969960.

The spelling of 6623181 in words is "six million, six hundred twenty-three thousand, one hundred eighty-one".