221264413 has 8 divisors (see below), whose sum is σ = 229211640. Its totient is φ = 213438720.

The previous prime is 221264411. The next prime is 221264423. The reversal of 221264413 is 314462122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18429849 + 202834564 = 4293^2 + 14242^2 .

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 221264413 - 2¹ = 221264411 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221264411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26670 + ... + 33967.

It is an arithmetic number, because the mean of its divisors is an integer number (28651455).

Almost surely, 2^221264413 is an apocalyptic number.

It is an amenable number.

221264413 is a deficient number, since it is larger than the sum of its proper divisors (7947227).

221264413 is an equidigital number, since it uses as much as digits as its factorization.

221264413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60767.

The product of its digits is 2304, while the sum is 25.

The square root of 221264413 is about 14874.9592604484. The cubic root of 221264413 is about 604.8353835763.

The spelling of 221264413 in words is "two hundred twenty-one million, two hundred sixty-four thousand, four hundred thirteen".