221676229 has 4 divisors (see below), whose sum is σ = 221776960. Its totient is φ = 221575500.

The previous prime is 221676197. The next prime is 221676233. The reversal of 221676229 is 922676122.

It is a happy number.

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 221676229 - 2⁵ = 221676197 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 (221676269) 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 3 ways as a sum of consecutive naturals, for example, 46989 + ... + 51490.

It is an arithmetic number, because the mean of its divisors is an integer number (55444240).

Almost surely, 2^221676229 is an apocalyptic number.

It is an amenable number.

221676229 is a deficient number, since it is larger than the sum of its proper divisors (100731).

221676229 is an equidigital number, since it uses as much as digits as its factorization.

221676229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100730.

The product of its digits is 36288, while the sum is 37.

The square root of 221676229 is about 14888.7954180316. The cubic root of 221676229 is about 605.2103896836.

The spelling of 221676229 in words is "two hundred twenty-one million, six hundred seventy-six thousand, two hundred twenty-nine".