221468569 has 16 divisors (see below), whose sum is σ = 262033408. Its totient is φ = 183218112.

The previous prime is 221468551. The next prime is 221468573. The reversal of 221468569 is 965864122.

It is not a de Polignac number, because 221468569 - 2²³ = 213079961 is a prime.

It is a super-2 number, since 2×221468569² = 98096654109815522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221468509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29527 + ... + 36259.

It is an arithmetic number, because the mean of its divisors is an integer number (16377088).

Almost surely, 2^221468569 is an apocalyptic number.

It is an amenable number.

221468569 is a deficient number, since it is larger than the sum of its proper divisors (40564839).

221468569 is a wasteful number, since it uses less digits than its factorization.

221468569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6904.

The product of its digits is 207360, while the sum is 43.

The square root of 221468569 is about 14881.8200835785. The cubic root of 221468569 is about 605.0213493365.

The spelling of 221468569 in words is "two hundred twenty-one million, four hundred sixty-eight thousand, five hundred sixty-nine".