221699069 has 4 divisors (see below), whose sum is σ = 221820060. Its totient is φ = 221578080.

The previous prime is 221699041. The next prime is 221699111. The reversal of 221699069 is 960996122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1562500 + 220136569 = 1250^2 + 14837^2 .

It is a cyclic number.

It is not a de Polignac number, because 221699069 - 2¹² = 221694973 is a prime.

It is a super-2 number, since 2×221699069² = 98300954390933522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221699039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57704 + ... + 61425.

It is an arithmetic number, because the mean of its divisors is an integer number (55455015).

Almost surely, 2^221699069 is an apocalyptic number.

It is an amenable number.

221699069 is a deficient number, since it is larger than the sum of its proper divisors (120991).

221699069 is a wasteful number, since it uses less digits than its factorization.

221699069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120990.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 221699069 is about 14889.5624180162. The cubic root of 221699069 is about 605.2311745473.

The spelling of 221699069 in words is "two hundred twenty-one million, six hundred ninety-nine thousand, sixty-nine".