865225447 has 2 divisors, whose sum is σ = 865225448. Its totient is φ = 865225446.

The previous prime is 865225429. The next prime is 865225481. The reversal of 865225447 is 744522568.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 865225447 - 2¹¹ = 865223399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (865226447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432612723 + 432612724.

It is an arithmetic number, because the mean of its divisors is an integer number (432612724).

Almost surely, 2^865225447 is an apocalyptic number.

865225447 is a deficient number, since it is larger than the sum of its proper divisors (1).

865225447 is an equidigital number, since it uses as much as digits as its factorization.

865225447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 537600, while the sum is 43.

The square root of 865225447 is about 29414.7148039888. The cubic root of 865225447 is about 952.8907137949.

The spelling of 865225447 in words is "eight hundred sixty-five million, two hundred twenty-five thousand, four hundred forty-seven".