225991349 has 2 divisors, whose sum is σ = 225991350. Its totient is φ = 225991348.

The previous prime is 225991331. The next prime is 225991357. The reversal of 225991349 is 943199522.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215796100 + 10195249 = 14690^2 + 3193^2 .

It is a cyclic number.

It is not a de Polignac number, because 225991349 - 2¹⁶ = 225925813 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225991379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112995674 + 112995675.

It is an arithmetic number, because the mean of its divisors is an integer number (112995675).

Almost surely, 2^225991349 is an apocalyptic number.

It is an amenable number.

225991349 is a deficient number, since it is larger than the sum of its proper divisors (1).

225991349 is an equidigital number, since it uses as much as digits as its factorization.

225991349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 44.

The square root of 225991349 is about 15033.0086476394. The cubic root of 225991349 is about 609.1121626740.

The spelling of 225991349 in words is "two hundred twenty-five million, nine hundred ninety-one thousand, three hundred forty-nine".