81825092 has 12 divisors (see below), whose sum is σ = 143270400. Its totient is φ = 40890696.

The previous prime is 81825091. The next prime is 81825127. The reversal of 81825092 is 29052818.

It is not an unprimeable number, because it can be changed into a prime (81825091) 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, 5333 + ... + 13859.

It is an arithmetic number, because the mean of its divisors is an integer number (11939200).

Almost surely, 2^81825092 is an apocalyptic number.

It is an amenable number.

81825092 is a deficient number, since it is larger than the sum of its proper divisors (61445308).

81825092 is a wasteful number, since it uses less digits than its factorization.

81825092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10930 (or 10928 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 81825092 is about 9045.7223039401. The cubic root of 81825092 is about 434.1390325228.

The spelling of 81825092 in words is "eighty-one million, eight hundred twenty-five thousand, ninety-two".