81341534 has 4 divisors (see below), whose sum is σ = 122012304. Its totient is φ = 40670766.

The previous prime is 81341531. The next prime is 81341539. The reversal of 81341534 is 43514318.

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

It is a junction number, because it is equal to n+sod(n) for n = 81341497 and 81341506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81341531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20335382 + ... + 20335385.

It is an arithmetic number, because the mean of its divisors is an integer number (30503076).

Almost surely, 2^81341534 is an apocalyptic number.

81341534 is a deficient number, since it is larger than the sum of its proper divisors (40670770).

81341534 is a wasteful number, since it uses less digits than its factorization.

81341534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40670769.

The product of its digits is 5760, while the sum is 29.

The square root of 81341534 is about 9018.9541522285. The cubic root of 81341534 is about 433.2821384622.

The spelling of 81341534 in words is "eighty-one million, three hundred forty-one thousand, five hundred thirty-four".