823255247 has 4 divisors (see below), whose sum is σ = 828780600. Its totient is φ = 817729896.

The previous prime is 823255231. The next prime is 823255249. The reversal of 823255247 is 742552328.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 823255247 - 2⁴ = 823255231 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 823255247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823255249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2762453 + ... + 2762750.

It is an arithmetic number, because the mean of its divisors is an integer number (207195150).

Almost surely, 2^823255247 is an apocalyptic number.

823255247 is a deficient number, since it is larger than the sum of its proper divisors (5525353).

823255247 is a wasteful number, since it uses less digits than its factorization.

823255247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5525352.

The product of its digits is 134400, while the sum is 38.

The square root of 823255247 is about 28692.4249062361. The cubic root of 823255247 is about 937.2270957244.

The spelling of 823255247 in words is "eight hundred twenty-three million, two hundred fifty-five thousand, two hundred forty-seven".