81053283 has 8 divisors (see below), whose sum is σ = 108718848. Its totient is φ = 53711624.

The previous prime is 81053281. The next prime is 81053309. The reversal of 81053283 is 38235018.

It is a happy number.

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 81053283 - 2¹ = 81053281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81053283.

It is not an unprimeable number, because it can be changed into a prime (81053281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80391 + ... + 81392.

It is an arithmetic number, because the mean of its divisors is an integer number (13589856).

Almost surely, 2^81053283 is an apocalyptic number.

81053283 is a deficient number, since it is larger than the sum of its proper divisors (27665565).

81053283 is a wasteful number, since it uses less digits than its factorization.

81053283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161953.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 81053283 is about 9002.9596800163. The cubic root of 81053283 is about 432.7697236102.

The spelling of 81053283 in words is "eighty-one million, fifty-three thousand, two hundred eighty-three".