222521013 has 40 divisors (see below), whose sum is σ = 390541536. Its totient is φ = 124480800.

The previous prime is 222521011. The next prime is 222521111. The reversal of 222521013 is 310125222.

It is not a de Polignac number, because 222521013 - 2¹ = 222521011 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222521011) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1978 + ... + 21188.

Almost surely, 2^222521013 is an apocalyptic number.

It is an amenable number.

222521013 is a deficient number, since it is larger than the sum of its proper divisors (168020523).

222521013 is a wasteful number, since it uses less digits than its factorization.

222521013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19247 (or 19238 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 222521013 is about 14917.1382309074. The cubic root of 222521013 is about 605.9782121370.

Adding to 222521013 its reverse (310125222), we get a palindrome (532646235).

The spelling of 222521013 in words is "two hundred twenty-two million, five hundred twenty-one thousand, thirteen".