81314463 has 16 divisors (see below), whose sum is σ = 113587200. Its totient is φ = 51673440.

The previous prime is 81314459. The next prime is 81314473. The reversal of 81314463 is 36441318.

It is not a de Polignac number, because 81314463 - 2² = 81314459 is a prime.

It is a super-2 number, since 2×81314463² = 13224083785956738, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 81314463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81314473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 958 + ... + 12788.

It is an arithmetic number, because the mean of its divisors is an integer number (7099200).

Almost surely, 2^81314463 is an apocalyptic number.

81314463 is a deficient number, since it is larger than the sum of its proper divisors (32272737).

81314463 is a wasteful number, since it uses less digits than its factorization.

81314463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11942.

The product of its digits is 6912, while the sum is 30.

The square root of 81314463 is about 9017.4532435716. The cubic root of 81314463 is about 433.2340667427.

The spelling of 81314463 in words is "eighty-one million, three hundred fourteen thousand, four hundred sixty-three".