183138261 has 8 divisors (see below), whose sum is σ = 244713600. Its totient is φ = 121827552.

The previous prime is 183138251. The next prime is 183138299. The reversal of 183138261 is 162831381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 183138261 - 2⁹ = 183137749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (183138251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64536 + ... + 67313.

It is an arithmetic number, because the mean of its divisors is an integer number (30589200).

Almost surely, 2^183138261 is an apocalyptic number.

It is an amenable number.

183138261 is a deficient number, since it is larger than the sum of its proper divisors (61575339).

183138261 is a wasteful number, since it uses less digits than its factorization.

183138261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132315.

The product of its digits is 6912, while the sum is 33.

The square root of 183138261 is about 13532.8585672060. The cubic root of 183138261 is about 567.8840818878.

The spelling of 183138261 in words is "one hundred eighty-three million, one hundred thirty-eight thousand, two hundred sixty-one".