825542211 has 16 divisors (see below), whose sum is σ = 1187778816. Its totient is φ = 507003936.

The previous prime is 825542203. The next prime is 825542227. The reversal of 825542211 is 112245528.

It is not a de Polignac number, because 825542211 - 2³ = 825542203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (825542231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1425 + ... + 40658.

It is an arithmetic number, because the mean of its divisors is an integer number (74236176).

Almost surely, 2^825542211 is an apocalyptic number.

825542211 is a deficient number, since it is larger than the sum of its proper divisors (362236605).

825542211 is a wasteful number, since it uses less digits than its factorization.

825542211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42602.

The product of its digits is 6400, while the sum is 30.

The square root of 825542211 is about 28732.2503643554. The cubic root of 825542211 is about 938.0941508020.

Adding to 825542211 its reverse (112245528), we get a palindrome (937787739).

The spelling of 825542211 in words is "eight hundred twenty-five million, five hundred forty-two thousand, two hundred eleven".