221424269 has 16 divisors (see below), whose sum is σ = 256421376. Its totient is φ = 188966400.

The previous prime is 221424263. The next prime is 221424277. The reversal of 221424269 is 962424122.

221424269 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221424269 is a prime.

It is a super-2 number, since 2×221424269² = 98057413804368722, 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 (221424263) 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, 84164 + ... + 86754.

It is an arithmetic number, because the mean of its divisors is an integer number (16026336).

Almost surely, 2^221424269 is an apocalyptic number.

It is an amenable number.

221424269 is a deficient number, since it is larger than the sum of its proper divisors (34997107).

221424269 is a wasteful number, since it uses less digits than its factorization.

221424269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3076.

The product of its digits is 13824, while the sum is 32.

The square root of 221424269 is about 14880.3316159285. The cubic root of 221424269 is about 604.9810061655.

The spelling of 221424269 in words is "two hundred twenty-one million, four hundred twenty-four thousand, two hundred sixty-nine".