225815069 has 2 divisors, whose sum is σ = 225815070. Its totient is φ = 225815068.

The previous prime is 225815027. The next prime is 225815071. The reversal of 225815069 is 960518522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221563225 + 4251844 = 14885^2 + 2062^2 .

It is a cyclic number.

It is not a de Polignac number, because 225815069 - 2²⁴ = 209037853 is a prime.

It is a super-2 number, since 2×225815069² = 101984890774949522, which contains 22 as substring.

Together with 225815071, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225835069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112907534 + 112907535.

It is an arithmetic number, because the mean of its divisors is an integer number (112907535).

Almost surely, 2^225815069 is an apocalyptic number.

It is an amenable number.

225815069 is a deficient number, since it is larger than the sum of its proper divisors (1).

225815069 is an equidigital number, since it uses as much as digits as its factorization.

225815069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 225815069 is about 15027.1444060407. The cubic root of 225815069 is about 608.9537462523.

The spelling of 225815069 in words is "two hundred twenty-five million, eight hundred fifteen thousand, sixty-nine".