81233273 has 8 divisors (see below), whose sum is σ = 90071616. Its totient is φ = 72637200.

The previous prime is 81233233. The next prime is 81233281. The reversal of 81233273 is 37233218.

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

It is a cyclic number.

It is not a de Polignac number, because 81233273 - 2⁶ = 81233209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (81233233) 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, 59861 + ... + 61202.

It is an arithmetic number, because the mean of its divisors is an integer number (11258952).

Almost surely, 2^81233273 is an apocalyptic number.

It is an amenable number.

81233273 is a deficient number, since it is larger than the sum of its proper divisors (8838343).

81233273 is a wasteful number, since it uses less digits than its factorization.

81233273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121135.

The product of its digits is 6048, while the sum is 29.

The square root of 81233273 is about 9012.9502938827. The cubic root of 81233273 is about 433.0898284121.

The spelling of 81233273 in words is "eighty-one million, two hundred thirty-three thousand, two hundred seventy-three".