221716354 has 4 divisors (see below), whose sum is σ = 332574534. Its totient is φ = 110858176.

The previous prime is 221716337. The next prime is 221716361. The reversal of 221716354 is 453617122.

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., 130074025 + 91642329 = 11405^2 + 9573^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55429087 + ... + 55429090.

Almost surely, 2^221716354 is an apocalyptic number.

221716354 is a deficient number, since it is larger than the sum of its proper divisors (110858180).

221716354 is a wasteful number, since it uses less digits than its factorization.

221716354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110858179.

The product of its digits is 10080, while the sum is 31.

The square root of 221716354 is about 14890.1428468635. The cubic root of 221716354 is about 605.2469032992.

The spelling of 221716354 in words is "two hundred twenty-one million, seven hundred sixteen thousand, three hundred fifty-four".