221225000231 has 4 divisors (see below), whose sum is σ = 221242488600. Its totient is φ = 221207511864.

The previous prime is 221225000209. The next prime is 221225000263. The reversal of 221225000231 is 132000522122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221225000231 - 2³⁴ = 204045131047 is a prime.

It is a super-2 number, since 2×221225000231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221225000291) 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, 8725196 + ... + 8750513.

It is an arithmetic number, because the mean of its divisors is an integer number (55310622150).

Almost surely, 2^221225000231 is an apocalyptic number.

221225000231 is a deficient number, since it is larger than the sum of its proper divisors (17488369).

221225000231 is a wasteful number, since it uses less digits than its factorization.

221225000231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17488368.

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 221225000231 its reverse (132000522122), we get a palindrome (353225522353).

The spelling of 221225000231 in words is "two hundred twenty-one billion, two hundred twenty-five million, two hundred thirty-one", and thus it is an aban number.