225501491 has 2 divisors, whose sum is σ = 225501492. Its totient is φ = 225501490.

The previous prime is 225501487. The next prime is 225501511. The reversal of 225501491 is 194105522.

225501491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225501491 - 2² = 225501487 is a prime.

It is a super-3 number, since 3×225501491³ (a number of 26 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (225581491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112750745 + 112750746.

It is an arithmetic number, because the mean of its divisors is an integer number (112750746).

Almost surely, 2^225501491 is an apocalyptic number.

225501491 is a deficient number, since it is larger than the sum of its proper divisors (1).

225501491 is an equidigital number, since it uses as much as digits as its factorization.

225501491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 225501491 is about 15016.7070624688. The cubic root of 225501491 is about 608.6717412226.

The spelling of 225501491 in words is "two hundred twenty-five million, five hundred one thousand, four hundred ninety-one".