183281138 has 4 divisors (see below), whose sum is σ = 274921710. Its totient is φ = 91640568.

The previous prime is 183281129. The next prime is 183281177. The reversal of 183281138 is 831182381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 831182381 = 41 ⋅20272741.

It can be written as a sum of positive squares in only one way, i.e., 180015889 + 3265249 = 13417^2 + 1807^2 .

It is a super-3 number, since 3×183281138³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 183281098 and 183281107.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45820283 + ... + 45820286.

Almost surely, 2^183281138 is an apocalyptic number.

183281138 is a deficient number, since it is larger than the sum of its proper divisors (91640572).

183281138 is an equidigital number, since it uses as much as digits as its factorization.

183281138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91640571.

The product of its digits is 9216, while the sum is 35.

The square root of 183281138 is about 13538.1364301000. The cubic root of 183281138 is about 568.0317234976.

The spelling of 183281138 in words is "one hundred eighty-three million, two hundred eighty-one thousand, one hundred thirty-eight".