81825295 has 4 divisors (see below), whose sum is σ = 98190360. Its totient is φ = 65460232.

The previous prime is 81825281. The next prime is 81825307. The reversal of 81825295 is 59252818.

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 81825295 - 2⁹ = 81824783 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8182525 + ... + 8182534.

It is an arithmetic number, because the mean of its divisors is an integer number (24547590).

Almost surely, 2^81825295 is an apocalyptic number.

81825295 is a deficient number, since it is larger than the sum of its proper divisors (16365065).

81825295 is a wasteful number, since it uses less digits than its factorization.

81825295 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16365064.

The product of its digits is 57600, while the sum is 40.

The square root of 81825295 is about 9045.7335247066. The cubic root of 81825295 is about 434.1393915412.

The spelling of 81825295 in words is "eighty-one million, eight hundred twenty-five thousand, two hundred ninety-five".