825220539 has 24 divisors (see below), whose sum is σ = 1400376432. Its totient is φ = 461661120.

The previous prime is 825220537. The next prime is 825220567. The reversal of 825220539 is 935022528.

825220539 is a `hidden beast` number, since 82 + 522 + 0 + 53 + 9 = 666.

It is not a de Polignac number, because 825220539 - 2¹ = 825220537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (825220537) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 319312 + ... + 321885.

It is an arithmetic number, because the mean of its divisors is an integer number (58349018).

Almost surely, 2^825220539 is an apocalyptic number.

825220539 is a deficient number, since it is larger than the sum of its proper divisors (575155893).

825220539 is a wasteful number, since it uses less digits than its factorization.

825220539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641227 (or 641224 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 825220539 is about 28726.6520673746. The cubic root of 825220539 is about 937.9722923760.

The spelling of 825220539 in words is "eight hundred twenty-five million, two hundred twenty thousand, five hundred thirty-nine".