285515047 has 2 divisors, whose sum is σ = 285515048. Its totient is φ = 285515046.

The previous prime is 285515029. The next prime is 285515099. The reversal of 285515047 is 740515582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 285515047 - 2¹¹ = 285512999 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 285514997 and 285515015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285516047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142757523 + 142757524.

It is an arithmetic number, because the mean of its divisors is an integer number (142757524).

Almost surely, 2^285515047 is an apocalyptic number.

285515047 is a deficient number, since it is larger than the sum of its proper divisors (1).

285515047 is an equidigital number, since it uses as much as digits as its factorization.

285515047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56000, while the sum is 37.

The square root of 285515047 is about 16897.1905061167. The cubic root of 285515047 is about 658.4806241749.

The spelling of 285515047 in words is "two hundred eighty-five million, five hundred fifteen thousand, forty-seven".