825556243 has 4 divisors (see below), whose sum is σ = 828602848. Its totient is φ = 822509640.

The previous prime is 825556231. The next prime is 825556271. The reversal of 825556243 is 342655528.

It is a happy number.

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 825556243 - 2¹³ = 825548051 is a prime.

It is a super-2 number, since 2×825556243² = 1363086220712550098, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 825556196 and 825556205.

It is not an unprimeable number, because it can be changed into a prime (825556223) 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, 1522896 + ... + 1523437.

It is an arithmetic number, because the mean of its divisors is an integer number (207150712).

Almost surely, 2^825556243 is an apocalyptic number.

825556243 is a deficient number, since it is larger than the sum of its proper divisors (3046605).

825556243 is a wasteful number, since it uses less digits than its factorization.

825556243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3046604.

The product of its digits is 288000, while the sum is 40.

The square root of 825556243 is about 28732.4945488553. The cubic root of 825556243 is about 938.0994657988.

The spelling of 825556243 in words is "eight hundred twenty-five million, five hundred fifty-six thousand, two hundred forty-three".