221672042 has 4 divisors (see below), whose sum is σ = 332508066. Its totient is φ = 110836020.

The previous prime is 221672029. The next prime is 221672047. The reversal of 221672042 is 240276122.

221672042 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 219958561 + 1713481 = 14831^2 + 1309^2 .

It is not an unprimeable number, because it can be changed into a prime (221672047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55418009 + ... + 55418012.

Almost surely, 2^221672042 is an apocalyptic number.

221672042 is a deficient number, since it is larger than the sum of its proper divisors (110836024).

221672042 is a wasteful number, since it uses less digits than its factorization.

221672042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110836023.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 221672042 is about 14888.6548082760. The cubic root of 221672042 is about 605.2065792738.

The spelling of 221672042 in words is "two hundred twenty-one million, six hundred seventy-two thousand, forty-two".