181364 has 6 divisors (see below), whose sum is σ = 317394. Its totient is φ = 90680.

The previous prime is 181361. The next prime is 181387. The reversal of 181364 is 463181.

It can be written as a sum of positive squares in only one way, i.e., 96100 + 85264 = 310^2 + 292^2 .

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 181364.

It is not an unprimeable number, because it can be changed into a prime (181361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22667 + ... + 22674.

It is an arithmetic number, because the mean of its divisors is an integer number (52899).

2¹⁸¹³⁶⁴ is an apocalyptic number.

It is an amenable number.

181364 is a deficient number, since it is larger than the sum of its proper divisors (136030).

181364 is a wasteful number, since it uses less digits than its factorization.

181364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45345 (or 45343 counting only the distinct ones).

The product of its digits is 576, while the sum is 23.

The square root of 181364 is about 425.8685243124. The cubic root of 181364 is about 56.6044222344.

It can be divided in two parts, 181 and 364, that added together give a palindrome (545).

The spelling of 181364 in words is "one hundred eighty-one thousand, three hundred sixty-four".