81182333 has 2 divisors, whose sum is σ = 81182334. Its totient is φ = 81182332.

The previous prime is 81182303. The next prime is 81182347. The reversal of 81182333 is 33328118.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51294244 + 29888089 = 7162^2 + 5467^2 .

It is a cyclic number.

It is not a de Polignac number, because 81182333 - 2²² = 76988029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81182296 and 81182305.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81182303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40591166 + 40591167.

It is an arithmetic number, because the mean of its divisors is an integer number (40591167).

Almost surely, 2^81182333 is an apocalyptic number.

It is an amenable number.

81182333 is a deficient number, since it is larger than the sum of its proper divisors (1).

81182333 is an equidigital number, since it uses as much as digits as its factorization.

81182333 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 29.

The square root of 81182333 is about 9010.1239170169. The cubic root of 81182333 is about 432.9992817344. Note that the first 3 decimals are identical.

The spelling of 81182333 in words is "eighty-one million, one hundred eighty-two thousand, three hundred thirty-three".