221776233 has 8 divisors (see below), whose sum is σ = 337944768. Its totient is φ = 126729264.

The previous prime is 221776229. The next prime is 221776273. The reversal of 221776233 is 332677122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221776233 - 2² = 221776229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221776194 and 221776203.

It is not an unprimeable number, because it can be changed into a prime (221776273) 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, 5280366 + ... + 5280407.

It is an arithmetic number, because the mean of its divisors is an integer number (42243096).

Almost surely, 2^221776233 is an apocalyptic number.

It is an amenable number.

221776233 is a deficient number, since it is larger than the sum of its proper divisors (116168535).

221776233 is a wasteful number, since it uses less digits than its factorization.

221776233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10560783.

The product of its digits is 21168, while the sum is 33.

The square root of 221776233 is about 14892.1534037224. The cubic root of 221776233 is about 605.3013847971.

The spelling of 221776233 in words is "two hundred twenty-one million, seven hundred seventy-six thousand, two hundred thirty-three".