182149721 has 12 divisors (see below), whose sum is σ = 200483820. Its totient is φ = 165372480.

The previous prime is 182149717. The next prime is 182149741. The reversal of 182149721 is 127941281.

It can be written as a sum of positive squares in 6 ways, for example, as 103632400 + 78517321 = 10180^2 + 8861^2 .

It is not a de Polignac number, because 182149721 - 2² = 182149717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (182149741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1475 + ... + 19143.

It is an arithmetic number, because the mean of its divisors is an integer number (16706985).

Almost surely, 2^182149721 is an apocalyptic number.

It is an amenable number.

182149721 is a deficient number, since it is larger than the sum of its proper divisors (18334099).

182149721 is a wasteful number, since it uses less digits than its factorization.

182149721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17756 (or 17743 counting only the distinct ones).

The product of its digits is 8064, while the sum is 35.

The square root of 182149721 is about 13496.2854519308. The cubic root of 182149721 is about 566.8604668538.

The spelling of 182149721 in words is "one hundred eighty-two million, one hundred forty-nine thousand, seven hundred twenty-one".