182919221 has 2 divisors, whose sum is σ = 182919222. Its totient is φ = 182919220.

The previous prime is 182919203. The next prime is 182919257. The reversal of 182919221 is 122919281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182547121 + 372100 = 13511^2 + 610^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-182919221 is a prime.

It is a super-2 number, since 2×182919221² = 66918882822493682, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (182919421) 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 as a sum of consecutive naturals, namely, 91459610 + 91459611.

It is an arithmetic number, because the mean of its divisors is an integer number (91459611).

Almost surely, 2^182919221 is an apocalyptic number.

It is an amenable number.

182919221 is a deficient number, since it is larger than the sum of its proper divisors (1).

182919221 is an equidigital number, since it uses as much as digits as its factorization.

182919221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 35.

The square root of 182919221 is about 13524.7632511627. The cubic root of 182919221 is about 567.6575882485.

The spelling of 182919221 in words is "one hundred eighty-two million, nine hundred nineteen thousand, two hundred twenty-one".