221150266 has 8 divisors (see below), whose sum is σ = 334661364. Its totient is φ = 109596480.

The previous prime is 221150243. The next prime is 221150273. The reversal of 221150266 is 662051122.

It can be written as a sum of positive squares in 2 ways, for example, as 148133241 + 73017025 = 12171^2 + 8545^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 221150266.

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, 489045 + ... + 489496.

Almost surely, 2^221150266 is an apocalyptic number.

221150266 is a deficient number, since it is larger than the sum of its proper divisors (113511098).

221150266 is a wasteful number, since it uses less digits than its factorization.

221150266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978656.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 221150266 is about 14871.1218810149. The cubic root of 221150266 is about 604.7313571775.

The spelling of 221150266 in words is "two hundred twenty-one million, one hundred fifty thousand, two hundred sixty-six".