182115221 has 8 divisors (see below), whose sum is σ = 188892984. Its totient is φ = 175435200.

The previous prime is 182115187. The next prime is 182115233. The reversal of 182115221 is 122511281.

It can be written as a sum of positive squares in 4 ways, for example, as 135466321 + 46648900 = 11639^2 + 6830^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 182115221 - 2¹⁴ = 182098837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (182115251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20630 + ... + 28103.

It is an arithmetic number, because the mean of its divisors is an integer number (23611623).

Almost surely, 2^182115221 is an apocalyptic number.

It is an amenable number.

182115221 is a deficient number, since it is larger than the sum of its proper divisors (6777763).

182115221 is a wasteful number, since it uses less digits than its factorization.

182115221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48871.

The product of its digits is 320, while the sum is 23.

The square root of 182115221 is about 13495.0072619469. The cubic root of 182115221 is about 566.8246759289.

It can be divided in two parts, 18211 and 5221, that added together give a palindrome (23432).

The spelling of 182115221 in words is "one hundred eighty-two million, one hundred fifteen thousand, two hundred twenty-one".