221739074 has 8 divisors (see below), whose sum is σ = 332771088. Its totient is φ = 110815380.

The previous prime is 221739061. The next prime is 221739127. The reversal of 221739074 is 470937122.

221739074 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21752 + ... + 30275.

It is an arithmetic number, because the mean of its divisors is an integer number (41596386).

Almost surely, 2^221739074 is an apocalyptic number.

221739074 is a deficient number, since it is larger than the sum of its proper divisors (111032014).

221739074 is a wasteful number, since it uses less digits than its factorization.

221739074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54160.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 221739074 is about 14890.9057481404. The cubic root of 221739074 is about 605.2675764697.

The spelling of 221739074 in words is "two hundred twenty-one million, seven hundred thirty-nine thousand, seventy-four".