81463223 has 8 divisors (see below), whose sum is σ = 82840320. Its totient is φ = 80091000.

The previous prime is 81463211. The next prime is 81463253. The reversal of 81463223 is 32236418.

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 81463223 - 2¹² = 81459127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81463253) 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, 49508 + ... + 51126.

It is an arithmetic number, because the mean of its divisors is an integer number (10355040).

Almost surely, 2^81463223 is an apocalyptic number.

81463223 is a deficient number, since it is larger than the sum of its proper divisors (1377097).

81463223 is a wasteful number, since it uses less digits than its factorization.

81463223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2437.

The product of its digits is 6912, while the sum is 29.

The square root of 81463223 is about 9025.6979231525. The cubic root of 81463223 is about 433.4980978309.

The spelling of 81463223 in words is "eighty-one million, four hundred sixty-three thousand, two hundred twenty-three".