221016274 has 4 divisors (see below), whose sum is σ = 331524414. Its totient is φ = 110508136.

The previous prime is 221016247. The next prime is 221016277. The reversal of 221016274 is 472610122.

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., 198387225 + 22629049 = 14085^2 + 4757^2 .

It is not an unprimeable number, because it can be changed into a prime (221016277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55254067 + ... + 55254070.

Almost surely, 2^221016274 is an apocalyptic number.

221016274 is a deficient number, since it is larger than the sum of its proper divisors (110508140).

221016274 is a wasteful number, since it uses less digits than its factorization.

221016274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110508139.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 221016274 is about 14866.6160910948. The cubic root of 221016274 is about 604.6091996120.

Adding to 221016274 its reverse (472610122), we get a palindrome (693626396).

The spelling of 221016274 in words is "two hundred twenty-one million, sixteen thousand, two hundred seventy-four".