221272571 has 8 divisors (see below), whose sum is σ = 240009840. Its totient is φ = 202780512.

The previous prime is 221272549. The next prime is 221272573. The reversal of 221272571 is 175272122.

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

It is a cyclic number.

It is not a de Polignac number, because 221272571 - 2¹⁴ = 221256187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221272573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59420 + ... + 63033.

It is an arithmetic number, because the mean of its divisors is an integer number (30001230).

Almost surely, 2^221272571 is an apocalyptic number.

221272571 is a deficient number, since it is larger than the sum of its proper divisors (18737269).

221272571 is a wasteful number, since it uses less digits than its factorization.

221272571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122605.

The product of its digits is 3920, while the sum is 29.

The square root of 221272571 is about 14875.2334771593. The cubic root of 221272571 is about 604.8428168946.

The spelling of 221272571 in words is "two hundred twenty-one million, two hundred seventy-two thousand, five hundred seventy-one".