81350 has 12 divisors (see below), whose sum is σ = 151404. Its totient is φ = 32520.

The previous prime is 81349. The next prime is 81353. The reversal of 81350 is 5318.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81353) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 764 + ... + 863.

It is an arithmetic number, because the mean of its divisors is an integer number (12617).

2⁸¹³⁵⁰ is an apocalyptic number.

81350 is a deficient number, since it is larger than the sum of its proper divisors (70054).

81350 is a wasteful number, since it uses less digits than its factorization.

81350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1639 (or 1634 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 81350 is about 285.2192139390. The cubic root of 81350 is about 43.3297169895.

Adding to 81350 its reverse (5318), we get a palindrome (86668).

The spelling of 81350 in words is "eighty-one thousand, three hundred fifty".