132721218 has 48 divisors (see below), whose sum is σ = 329299776. Its totient is φ = 37844640.

The previous prime is 132721217. The next prime is 132721229. The reversal of 132721218 is 812127231.

It is a super-2 number, since 2×132721218² = 35229843414807048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 132721191 and 132721200.

It is not an unprimeable number, because it can be changed into a prime (132721217) 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 23 ways as a sum of consecutive naturals, for example, 102805 + ... + 104087.

It is an arithmetic number, because the mean of its divisors is an integer number (6860412).

Almost surely, 2^132721218 is an apocalyptic number.

132721218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

132721218 is an abundant number, since it is smaller than the sum of its proper divisors (196578558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

132721218 is a wasteful number, since it uses less digits than its factorization.

132721218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2119 (or 2116 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 132721218 is about 11520.4695216818. The cubic root of 132721218 is about 510.0899725924.

Adding to 132721218 its reverse (812127231), we get a palindrome (944848449).

The spelling of 132721218 in words is "one hundred thirty-two million, seven hundred twenty-one thousand, two hundred eighteen".