225722429 has 2 divisors, whose sum is σ = 225722430. Its totient is φ = 225722428.

The previous prime is 225722411. The next prime is 225722443. The reversal of 225722429 is 924227522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122699929 + 103022500 = 11077^2 + 10150^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225722429 is a prime.

It is a super-2 number, since 2×225722429² = 101901229907320082, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225722449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112861214 + 112861215.

It is an arithmetic number, because the mean of its divisors is an integer number (112861215).

Almost surely, 2^225722429 is an apocalyptic number.

It is an amenable number.

225722429 is a deficient number, since it is larger than the sum of its proper divisors (1).

225722429 is an equidigital number, since it uses as much as digits as its factorization.

225722429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 35.

The square root of 225722429 is about 15024.0616678713. The cubic root of 225722429 is about 608.8704610054.

The spelling of 225722429 in words is "two hundred twenty-five million, seven hundred twenty-two thousand, four hundred twenty-nine".