81463103 has 4 divisors (see below), whose sum is σ = 81505320. Its totient is φ = 81420888.

The previous prime is 81463087. The next prime is 81463111. The reversal of 81463103 is 30136418.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 81463103 - 2⁴ = 81463087 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81463163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18068 + ... + 22121.

It is an arithmetic number, because the mean of its divisors is an integer number (20376330).

Almost surely, 2^81463103 is an apocalyptic number.

81463103 is a deficient number, since it is larger than the sum of its proper divisors (42217).

81463103 is a wasteful number, since it uses less digits than its factorization.

81463103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42216.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 81463103 is about 9025.6912754647. The cubic root of 81463103 is about 433.4978849749.

The spelling of 81463103 in words is "eighty-one million, four hundred sixty-three thousand, one hundred three".