825215916 has 48 divisors (see below), whose sum is σ = 2202583040. Its totient is φ = 235560960.

The previous prime is 825215899. The next prime is 825215917. The reversal of 825215916 is 619512528.

It is not an unprimeable number, because it can be changed into a prime (825215917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103596 + ... + 111276.

Almost surely, 2^825215916 is an apocalyptic number.

It is an amenable number.

825215916 is an abundant number, since it is smaller than the sum of its proper divisors (1377367124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

825215916 is a wasteful number, since it uses less digits than its factorization.

825215916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8974 (or 8972 counting only the distinct ones).

The product of its digits is 43200, while the sum is 39.

The square root of 825215916 is about 28726.5716019159. The cubic root of 825215916 is about 937.9705408224.

The spelling of 825215916 in words is "eight hundred twenty-five million, two hundred fifteen thousand, nine hundred sixteen".