81852263 has 8 divisors (see below), whose sum is σ = 88683408. Its totient is φ = 75245184.

The previous prime is 81852233. The next prime is 81852283. The reversal of 81852263 is 36225818.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-81852263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81852223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55256 + ... + 56717.

It is an arithmetic number, because the mean of its divisors is an integer number (11085426).

Almost surely, 2^81852263 is an apocalyptic number.

81852263 is a deficient number, since it is larger than the sum of its proper divisors (6831145).

81852263 is a wasteful number, since it uses less digits than its factorization.

81852263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112033.

The product of its digits is 23040, while the sum is 35.

The square root of 81852263 is about 9047.2240493977. The cubic root of 81852263 is about 434.1870808901.

The spelling of 81852263 in words is "eighty-one million, eight hundred fifty-two thousand, two hundred sixty-three".