225851401 has 2 divisors, whose sum is σ = 225851402. Its totient is φ = 225851400.

The previous prime is 225851393. The next prime is 225851429. The reversal of 225851401 is 104158522.

It is an a-pointer prime, because the next prime (225851429) can be obtained adding 225851401 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 225600400 + 251001 = 15020^2 + 501^2 .

It is a cyclic number.

It is not a de Polignac number, because 225851401 - 2³ = 225851393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225851401.

It is not a weakly prime, because it can be changed into another prime (225851471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112925700 + 112925701.

It is an arithmetic number, because the mean of its divisors is an integer number (112925701).

Almost surely, 2^225851401 is an apocalyptic number.

It is an amenable number.

225851401 is a deficient number, since it is larger than the sum of its proper divisors (1).

225851401 is an equidigital number, since it uses as much as digits as its factorization.

225851401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 225851401 is about 15028.3532364661. The cubic root of 225851401 is about 608.9864032419.

The spelling of 225851401 in words is "two hundred twenty-five million, eight hundred fifty-one thousand, four hundred one".