81046223 has 2 divisors, whose sum is σ = 81046224. Its totient is φ = 81046222.

The previous prime is 81046219. The next prime is 81046241. The reversal of 81046223 is 32264018.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81046223 - 2² = 81046219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81046192 and 81046201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81046253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40523111 + 40523112.

It is an arithmetic number, because the mean of its divisors is an integer number (40523112).

Almost surely, 2^81046223 is an apocalyptic number.

81046223 is a deficient number, since it is larger than the sum of its proper divisors (1).

81046223 is an equidigital number, since it uses as much as digits as its factorization.

81046223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 81046223 is about 9002.5675781968. The cubic root of 81046223 is about 432.7571580367.

The spelling of 81046223 in words is "eighty-one million, forty-six thousand, two hundred twenty-three".