225798691 has 2 divisors, whose sum is σ = 225798692. Its totient is φ = 225798690.

The previous prime is 225798649. The next prime is 225798697. The reversal of 225798691 is 196897522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 225798691 - 2¹⁷ = 225667619 is a prime.

It is not a weakly prime, because it can be changed into another prime (225798697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112899345 + 112899346.

It is an arithmetic number, because the mean of its divisors is an integer number (112899346).

Almost surely, 2^225798691 is an apocalyptic number.

225798691 is a deficient number, since it is larger than the sum of its proper divisors (1).

225798691 is an equidigital number, since it uses as much as digits as its factorization.

225798691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 49.

The square root of 225798691 is about 15026.5994489771. The cubic root of 225798691 is about 608.9390237545.

The spelling of 225798691 in words is "two hundred twenty-five million, seven hundred ninety-eight thousand, six hundred ninety-one".