225501571 has 2 divisors, whose sum is σ = 225501572. Its totient is φ = 225501570.

The previous prime is 225501559. The next prime is 225501659. The reversal of 225501571 is 175105522.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225501571 is a prime.

It is not a weakly prime, because it can be changed into another prime (225501511) 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, 112750785 + 112750786.

It is an arithmetic number, because the mean of its divisors is an integer number (112750786).

Almost surely, 2^225501571 is an apocalyptic number.

225501571 is a deficient number, since it is larger than the sum of its proper divisors (1).

225501571 is an equidigital number, since it uses as much as digits as its factorization.

225501571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3500, while the sum is 28.

The square root of 225501571 is about 15016.7097261684. The cubic root of 225501571 is about 608.6718132010.

The spelling of 225501571 in words is "two hundred twenty-five million, five hundred one thousand, five hundred seventy-one".