221306914 has 8 divisors (see below), whose sum is σ = 332057628. Its totient is φ = 110621040.

The previous prime is 221306881. The next prime is 221306941. The reversal of 221306914 is 419603122.

It can be written as a sum of positive squares in 2 ways, for example, as 206353225 + 14953689 = 14365^2 + 3867^2 .

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

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, 6517 + ... + 22024.

Almost surely, 2^221306914 is an apocalyptic number.

221306914 is a deficient number, since it is larger than the sum of its proper divisors (110750714).

221306914 is a wasteful number, since it uses less digits than its factorization.

221306914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32420.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 221306914 is about 14876.3878008070. The cubic root of 221306914 is about 604.8741071749.

The spelling of 221306914 in words is "two hundred twenty-one million, three hundred six thousand, nine hundred fourteen".