221349895 has 16 divisors (see below), whose sum is σ = 295918560. Its totient is φ = 157820544.

The previous prime is 221349881. The next prime is 221349899. The reversal of 221349895 is 598943122.

It is a cyclic number.

It is not a de Polignac number, because 221349895 - 2¹⁵ = 221317127 is a prime.

It is a super-2 number, since 2×221349895² = 97991552033022050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221349899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56829 + ... + 60598.

It is an arithmetic number, because the mean of its divisors is an integer number (18494910).

Almost surely, 2^221349895 is an apocalyptic number.

221349895 is a deficient number, since it is larger than the sum of its proper divisors (74568665).

221349895 is a wasteful number, since it uses less digits than its factorization.

221349895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117474.

The product of its digits is 155520, while the sum is 43.

The square root of 221349895 is about 14877.8323353908. The cubic root of 221349895 is about 604.9132630703.

The spelling of 221349895 in words is "two hundred twenty-one million, three hundred forty-nine thousand, eight hundred ninety-five".