221077732 has 12 divisors (see below), whose sum is σ = 387166780. Its totient is φ = 110458656.

The previous prime is 221077723. The next prime is 221077733. The reversal of 221077732 is 237770122.

It can be written as a sum of positive squares in 2 ways, for example, as 10653696 + 210424036 = 3264^2 + 14506^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221077694 and 221077703.

It is not an unprimeable number, because it can be changed into a prime (221077733) 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 3 ways as a sum of consecutive naturals, for example, 13623 + ... + 25054.

Almost surely, 2^221077732 is an apocalyptic number.

It is an amenable number.

221077732 is a deficient number, since it is larger than the sum of its proper divisors (166089048).

221077732 is a wasteful number, since it uses less digits than its factorization.

221077732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40110 (or 40108 counting only the distinct ones).

The product of its (nonzero) digits is 8232, while the sum is 31.

The square root of 221077732 is about 14868.6829275494. The cubic root of 221077732 is about 604.6652356493.

The spelling of 221077732 in words is "two hundred twenty-one million, seventy-seven thousand, seven hundred thirty-two".