225731669 has 2 divisors, whose sum is σ = 225731670. Its totient is φ = 225731668.

The previous prime is 225731657. The next prime is 225731687. The reversal of 225731669 is 966137522.

225731669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127464100 + 98267569 = 11290^2 + 9913^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225731669 is a prime.

It is a super-2 number, since 2×225731669² = 101909572779051122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225731629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112865834 + 112865835.

It is an arithmetic number, because the mean of its divisors is an integer number (112865835).

Almost surely, 2^225731669 is an apocalyptic number.

It is an amenable number.

225731669 is a deficient number, since it is larger than the sum of its proper divisors (1).

225731669 is an equidigital number, since it uses as much as digits as its factorization.

225731669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 41.

The square root of 225731669 is about 15024.3691714494. The cubic root of 225731669 is about 608.8787689766.

It can be divided in two parts, 22573 and 1669, that added together give a palindrome (24242).

The spelling of 225731669 in words is "two hundred twenty-five million, seven hundred thirty-one thousand, six hundred sixty-nine".