825471809331 has 16 divisors (see below), whose sum is σ = 1185350423040. Its totient is φ = 507957979680.

The previous prime is 825471809329. The next prime is 825471809359. The reversal of 825471809331 is 133908174528.

It is not a de Polignac number, because 825471809331 - 2¹ = 825471809329 is a prime.

It is a super-2 number, since 2×825471809331² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (825471805331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 316246 + ... + 1323236.

It is an arithmetic number, because the mean of its divisors is an integer number (74084401440).

Almost surely, 2^825471809331 is an apocalyptic number.

825471809331 is a deficient number, since it is larger than the sum of its proper divisors (359878613709).

825471809331 is a wasteful number, since it uses less digits than its factorization.

825471809331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028026.

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 825471809331 in words is "eight hundred twenty-five billion, four hundred seventy-one million, eight hundred nine thousand, three hundred thirty-one".