182081381 has 4 divisors (see below), whose sum is σ = 182112492. Its totient is φ = 182050272.

The previous prime is 182081359. The next prime is 182081399. The reversal of 182081381 is 183180281.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2280100 + 179801281 = 1510^2 + 13409^2 .

It is a cyclic number.

It is not a de Polignac number, because 182081381 - 2¹⁴ = 182064997 is a prime.

It is a super-4 number, since 4×182081381⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (182081311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3830 + ... + 19463.

It is an arithmetic number, because the mean of its divisors is an integer number (45528123).

Almost surely, 2^182081381 is an apocalyptic number.

It is an amenable number.

182081381 is a deficient number, since it is larger than the sum of its proper divisors (31111).

182081381 is an equidigital number, since it uses as much as digits as its factorization.

182081381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31110.

The product of its (nonzero) digits is 3072, while the sum is 32.

The square root of 182081381 is about 13493.7534066693. The cubic root of 182081381 is about 566.7895653085.

The spelling of 182081381 in words is "one hundred eighty-two million, eighty-one thousand, three hundred eighty-one".