225636451 has 2 divisors, whose sum is σ = 225636452. Its totient is φ = 225636450.

The previous prime is 225636421. The next prime is 225636517. The reversal of 225636451 is 154636522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225636451 - 2⁹ = 225635939 is a prime.

It is not a weakly prime, because it can be changed into another prime (225636401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112818225 + 112818226.

It is an arithmetic number, because the mean of its divisors is an integer number (112818226).

Almost surely, 2^225636451 is an apocalyptic number.

225636451 is a deficient number, since it is larger than the sum of its proper divisors (1).

225636451 is an equidigital number, since it uses as much as digits as its factorization.

225636451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 34.

The square root of 225636451 is about 15021.2000519266. The cubic root of 225636451 is about 608.7931446413.

The spelling of 225636451 in words is "two hundred twenty-five million, six hundred thirty-six thousand, four hundred fifty-one".