221034361 has 4 divisors (see below), whose sum is σ = 221158224. Its totient is φ = 220910500.

The previous prime is 221034349. The next prime is 221034367. The reversal of 221034361 is 163430122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221034361 - 2⁵ = 221034329 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221034367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59215 + ... + 62836.

It is an arithmetic number, because the mean of its divisors is an integer number (55289556).

Almost surely, 2^221034361 is an apocalyptic number.

It is an amenable number.

221034361 is a deficient number, since it is larger than the sum of its proper divisors (123863).

221034361 is a wasteful number, since it uses less digits than its factorization.

221034361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123862.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 221034361 is about 14867.2243878943. The cubic root of 221034361 is about 604.6256920148.

Adding to 221034361 its reverse (163430122), we get a palindrome (384464483).

The spelling of 221034361 in words is "two hundred twenty-one million, thirty-four thousand, three hundred sixty-one".