81952233 has 16 divisors (see below), whose sum is σ = 120263616. Its totient is φ = 49226240.

The previous prime is 81952207. The next prime is 81952271. The reversal of 81952233 is 33225918.

It is a cyclic number.

It is not a de Polignac number, because 81952233 - 2¹³ = 81944041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 81952194 and 81952203.

It is not an unprimeable number, because it can be changed into a prime (81952333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7260 + ... + 14717.

It is an arithmetic number, because the mean of its divisors is an integer number (7516476).

Almost surely, 2^81952233 is an apocalyptic number.

It is an amenable number.

81952233 is a deficient number, since it is larger than the sum of its proper divisors (38311383).

81952233 is a wasteful number, since it uses less digits than its factorization.

81952233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22104.

The product of its digits is 12960, while the sum is 33.

The square root of 81952233 is about 9052.7472625717. The cubic root of 81952233 is about 434.3637733102.

The spelling of 81952233 in words is "eighty-one million, nine hundred fifty-two thousand, two hundred thirty-three".