81342363 has 16 divisors (see below), whose sum is σ = 115240320. Its totient is φ = 50890176.

The previous prime is 81342337. The next prime is 81342377. The reversal of 81342363 is 36324318.

It is not a de Polignac number, because 81342363 - 2¹² = 81338267 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81342363.

It is not an unprimeable number, because it can be changed into a prime (81342563) 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, 570 + ... + 12767.

It is an arithmetic number, because the mean of its divisors is an integer number (7202520).

Almost surely, 2^81342363 is an apocalyptic number.

81342363 is a deficient number, since it is larger than the sum of its proper divisors (33897957).

81342363 is a wasteful number, since it uses less digits than its factorization.

81342363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13466.

The product of its digits is 10368, while the sum is 30.

The square root of 81342363 is about 9019.0001108770. Note that the first 3 decimals coincide. The cubic root of 81342363 is about 433.2836104026.

The spelling of 81342363 in words is "eighty-one million, three hundred forty-two thousand, three hundred sixty-three".