221297294 has 16 divisors (see below), whose sum is σ = 349777680. Its totient is φ = 104716800.

The previous prime is 221297287. The next prime is 221297327. The reversal of 221297294 is 492792122.

221297294 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43694 + ... + 48494.

It is an arithmetic number, because the mean of its divisors is an integer number (21861105).

Almost surely, 2^221297294 is an apocalyptic number.

221297294 is a deficient number, since it is larger than the sum of its proper divisors (128480386).

221297294 is a wasteful number, since it uses less digits than its factorization.

221297294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6035.

The product of its digits is 36288, while the sum is 38.

The square root of 221297294 is about 14876.0644661147. The cubic root of 221297294 is about 604.8653426148.

The spelling of 221297294 in words is "two hundred twenty-one million, two hundred ninety-seven thousand, two hundred ninety-four".