222425531 has 2 divisors, whose sum is σ = 222425532. Its totient is φ = 222425530.

The previous prime is 222425519. The next prime is 222425549. The reversal of 222425531 is 135524222.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222425531 is a prime.

It is a super-2 number, since 2×222425531² = 98946233681263922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 222425531.

It is not a weakly prime, because it can be changed into another prime (222425551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111212765 + 111212766.

It is an arithmetic number, because the mean of its divisors is an integer number (111212766).

Almost surely, 2^222425531 is an apocalyptic number.

222425531 is a deficient number, since it is larger than the sum of its proper divisors (1).

222425531 is an equidigital number, since it uses as much as digits as its factorization.

222425531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4800, while the sum is 26.

The square root of 222425531 is about 14913.9374747248. The cubic root of 222425531 is about 605.8915262571.

Adding to 222425531 its reverse (135524222), we get a palindrome (357949753).

The spelling of 222425531 in words is "two hundred twenty-two million, four hundred twenty-five thousand, five hundred thirty-one".