221942694 has 32 divisors (see below), whose sum is σ = 462806784. Its totient is φ = 70892640.

The previous prime is 221942683. The next prime is 221942729. The reversal of 221942694 is 496249122.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5559 + ... + 21789.

It is an arithmetic number, because the mean of its divisors is an integer number (14462712).

Almost surely, 2^221942694 is an apocalyptic number.

221942694 is an abundant number, since it is smaller than the sum of its proper divisors (240864090).

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

221942694 is a wasteful number, since it uses less digits than its factorization.

221942694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16332.

The product of its digits is 62208, while the sum is 39.

The square root of 221942694 is about 14897.7412381878. The cubic root of 221942694 is about 605.4527894715.

The spelling of 221942694 in words is "two hundred twenty-one million, nine hundred forty-two thousand, six hundred ninety-four".