221138082 has 24 divisors (see below), whose sum is σ = 522690480. Its totient is φ = 67011480.

The previous prime is 221138041. The next prime is 221138089. The reversal of 221138082 is 280831122.

It is not an unprimeable number, because it can be changed into a prime (221138089) 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 11 ways as a sum of consecutive naturals, for example, 558232 + ... + 558627.

It is an arithmetic number, because the mean of its divisors is an integer number (21778770).

Almost surely, 2^221138082 is an apocalyptic number.

221138082 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221138082 is an abundant number, since it is smaller than the sum of its proper divisors (301552398).

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

221138082 is a wasteful number, since it uses less digits than its factorization.

221138082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116878 (or 1116875 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 221138082 is about 14870.7122223517. The cubic root of 221138082 is about 604.7202513319.

The spelling of 221138082 in words is "two hundred twenty-one million, one hundred thirty-eight thousand, eighty-two".