225021229 has 2 divisors, whose sum is σ = 225021230. Its totient is φ = 225021228.

The previous prime is 225021211. The next prime is 225021239. The reversal of 225021229 is 922120522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 224940004 + 81225 = 14998^2 + 285^2 .

It is a cyclic number.

It is not a de Polignac number, because 225021229 - 2¹⁹ = 224496941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225021239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112510614 + 112510615.

It is an arithmetic number, because the mean of its divisors is an integer number (112510615).

Almost surely, 2^225021229 is an apocalyptic number.

It is an amenable number.

225021229 is a deficient number, since it is larger than the sum of its proper divisors (1).

225021229 is an equidigital number, since it uses as much as digits as its factorization.

225021229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 225021229 is about 15000.7076166426. The cubic root of 225021229 is about 608.2393277063.

The spelling of 225021229 in words is "two hundred twenty-five million, twenty-one thousand, two hundred twenty-nine".