225215687 has 2 divisors, whose sum is σ = 225215688. Its totient is φ = 225215686.

The previous prime is 225215629. The next prime is 225215689. The reversal of 225215687 is 786512522.

225215687 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-225215687 is a prime.

Together with 225215689, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225215687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225215689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112607843 + 112607844.

It is an arithmetic number, because the mean of its divisors is an integer number (112607844).

Almost surely, 2^225215687 is an apocalyptic number.

225215687 is a deficient number, since it is larger than the sum of its proper divisors (1).

225215687 is an equidigital number, since it uses as much as digits as its factorization.

225215687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67200, while the sum is 38.

The square root of 225215687 is about 15007.1878444964. The cubic root of 225215687 is about 608.4144859189.

The spelling of 225215687 in words is "two hundred twenty-five million, two hundred fifteen thousand, six hundred eighty-seven".