81950 has 24 divisors (see below), whose sum is σ = 167400. Its totient is φ = 29600.

The previous prime is 81943. The next prime is 81953. The reversal of 81950 is 5918.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81953) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 476 + ... + 624.

It is an arithmetic number, because the mean of its divisors is an integer number (6975).

2⁸¹⁹⁵⁰ is an apocalyptic number.

81950 is an abundant number, since it is smaller than the sum of its proper divisors (85450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83700).

81950 is a wasteful number, since it uses less digits than its factorization.

81950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 81950 is about 286.2691041660. The cubic root of 81950 is about 43.4359828154.

The spelling of 81950 in words is "eighty-one thousand, nine hundred fifty".