81352 has 8 divisors (see below), whose sum is σ = 152550. Its totient is φ = 40672.

The previous prime is 81349. The next prime is 81353. The reversal of 81352 is 25318.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 51076 + 30276 = 226^2 + 174^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

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 as a sum of consecutive naturals, namely, 5077 + ... + 5092.

2⁸¹³⁵² is an apocalyptic number.

It is an amenable number.

81352 is a deficient number, since it is larger than the sum of its proper divisors (71198).

81352 is a wasteful number, since it uses less digits than its factorization.

81352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10175 (or 10171 counting only the distinct ones).

The product of its digits is 240, while the sum is 19.

The square root of 81352 is about 285.2227199926. Note that the first 3 decimals coincide. The cubic root of 81352 is about 43.3300720754.

It can be divided in two parts, 8 and 1352, that multiplied together give a square (10816 = 104²).

The spelling of 81352 in words is "eighty-one thousand, three hundred fifty-two".