221136229 has 8 divisors (see below), whose sum is σ = 227360672. Its totient is φ = 214961040.

The previous prime is 221136211. The next prime is 221136233. The reversal of 221136229 is 922631122.

221136229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 221136229 - 2⁵ = 221136197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221136197 and 221136206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221136259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3114 + ... + 21259.

It is an arithmetic number, because the mean of its divisors is an integer number (28420084).

Almost surely, 2^221136229 is an apocalyptic number.

It is an amenable number.

221136229 is a deficient number, since it is larger than the sum of its proper divisors (6224443).

221136229 is a wasteful number, since it uses less digits than its factorization.

221136229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24627.

The product of its digits is 2592, while the sum is 28.

The square root of 221136229 is about 14870.6499185476. The cubic root of 221136229 is about 604.7185622669.

The spelling of 221136229 in words is "two hundred twenty-one million, one hundred thirty-six thousand, two hundred twenty-nine".