222530531 has 2 divisors, whose sum is σ = 222530532. Its totient is φ = 222530530.

The previous prime is 222530509. The next prime is 222530533. The reversal of 222530531 is 135035222.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222530531 is a prime.

It is a super-2 number, since 2×222530531² = 99039674454283922, which contains 22 as substring.

Together with 222530533, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 222530497 and 222530506.

It is not a weakly prime, because it can be changed into another prime (222530533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111265265 + 111265266.

It is an arithmetic number, because the mean of its divisors is an integer number (111265266).

Almost surely, 2^222530531 is an apocalyptic number.

222530531 is a deficient number, since it is larger than the sum of its proper divisors (1).

222530531 is an equidigital number, since it uses as much as digits as its factorization.

222530531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 222530531 is about 14917.4572565166. The cubic root of 222530531 is about 605.9868519478.

Adding to 222530531 its reverse (135035222), we get a palindrome (357565753).

The spelling of 222530531 in words is "two hundred twenty-two million, five hundred thirty thousand, five hundred thirty-one".