81824295 has 32 divisors (see below), whose sum is σ = 150013440. Its totient is φ = 37307520.

The previous prime is 81824293. The next prime is 81824299. The reversal of 81824295 is 59242818.

It is not a de Polignac number, because 81824295 - 2¹ = 81824293 is a prime.

It is a Smith number, since the sum of its digits (39) 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 not an unprimeable number, because it can be changed into a prime (81824293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52680 + ... + 54210.

It is an arithmetic number, because the mean of its divisors is an integer number (4687920).

Almost surely, 2^81824295 is an apocalyptic number.

81824295 is a deficient number, since it is larger than the sum of its proper divisors (68189145).

81824295 is a wasteful number, since it uses less digits than its factorization.

81824295 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2055.

The product of its digits is 46080, while the sum is 39.

The square root of 81824295 is about 9045.6782498605. The cubic root of 81824295 is about 434.1376229718.

The spelling of 81824295 in words is "eighty-one million, eight hundred twenty-four thousand, two hundred ninety-five".