81350134 has 16 divisors (see below), whose sum is σ = 136004400. Its totient is φ = 36267264.

The previous prime is 81350123. The next prime is 81350197. The reversal of 81350134 is 43105318.

It is a junction number, because it is equal to n+sod(n) for n = 81350099 and 81350108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62319 + ... + 63610.

It is an arithmetic number, because the mean of its divisors is an integer number (8500275).

Almost surely, 2^81350134 is an apocalyptic number.

81350134 is a deficient number, since it is larger than the sum of its proper divisors (54654266).

81350134 is a wasteful number, since it uses less digits than its factorization.

81350134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125967.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 81350134 is about 9019.4309133115. The cubic root of 81350134 is about 433.2974078041.

The spelling of 81350134 in words is "eighty-one million, three hundred fifty thousand, one hundred thirty-four".