225940669 has 2 divisors, whose sum is σ = 225940670. Its totient is φ = 225940668.

The previous prime is 225940667. The next prime is 225940681. The reversal of 225940669 is 966049522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217208644 + 8732025 = 14738^2 + 2955^2 .

It is a cyclic number.

It is not a de Polignac number, because 225940669 - 2¹ = 225940667 is a prime.

It is a super-2 number, since 2×225940669² = 102098371816335122, which contains 22 as substring.

Together with 225940667, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225940667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112970334 + 112970335.

It is an arithmetic number, because the mean of its divisors is an integer number (112970335).

Almost surely, 2^225940669 is an apocalyptic number.

It is an amenable number.

225940669 is a deficient number, since it is larger than the sum of its proper divisors (1).

225940669 is an equidigital number, since it uses as much as digits as its factorization.

225940669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 225940669 is about 15031.3229291370. The cubic root of 225940669 is about 609.0666268420.

The spelling of 225940669 in words is "two hundred twenty-five million, nine hundred forty thousand, six hundred sixty-nine".