225581387 has 2 divisors, whose sum is σ = 225581388. Its totient is φ = 225581386.

The previous prime is 225581353. The next prime is 225581393. The reversal of 225581387 is 783185522.

225581387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225581387 is a prime.

It is not a weakly prime, because it can be changed into another prime (225581287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112790693 + 112790694.

It is an arithmetic number, because the mean of its divisors is an integer number (112790694).

Almost surely, 2^225581387 is an apocalyptic number.

225581387 is a deficient number, since it is larger than the sum of its proper divisors (1).

225581387 is an equidigital number, since it uses as much as digits as its factorization.

225581387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 134400, while the sum is 41.

The square root of 225581387 is about 15019.3670638945. The cubic root of 225581387 is about 608.7436176066.

The spelling of 225581387 in words is "two hundred twenty-five million, five hundred eighty-one thousand, three hundred eighty-seven".