221230433 has 8 divisors (see below), whose sum is σ = 235012800. Its totient is φ = 207661968.

The previous prime is 221230423. The next prime is 221230447. The reversal of 221230433 is 334032122.

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 221230433 - 2⁴ = 221230417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221230423) 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, 51341 + ... + 55482.

It is an arithmetic number, because the mean of its divisors is an integer number (29376600).

Almost surely, 2^221230433 is an apocalyptic number.

It is an amenable number.

221230433 is a deficient number, since it is larger than the sum of its proper divisors (13782367).

221230433 is a wasteful number, since it uses less digits than its factorization.

221230433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106951.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 221230433 is about 14873.8170285909. The cubic root of 221230433 is about 604.8044200815.

Adding to 221230433 its reverse (334032122), we get a palindrome (555262555).

The spelling of 221230433 in words is "two hundred twenty-one million, two hundred thirty thousand, four hundred thirty-three".