182138261 has 2 divisors, whose sum is σ = 182138262. Its totient is φ = 182138260.

The previous prime is 182138191. The next prime is 182138269. The reversal of 182138261 is 162831281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179399236 + 2739025 = 13394^2 + 1655^2 .

It is a cyclic number.

It is not a de Polignac number, because 182138261 - 2¹⁰ = 182137237 is a prime.

It is a super-2 number, since 2×182138261² = 66348692240208242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (182138269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 91069130 + 91069131.

It is an arithmetic number, because the mean of its divisors is an integer number (91069131).

Almost surely, 2^182138261 is an apocalyptic number.

It is an amenable number.

182138261 is a deficient number, since it is larger than the sum of its proper divisors (1).

182138261 is an equidigital number, since it uses as much as digits as its factorization.

182138261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 32.

The square root of 182138261 is about 13495.8608839896. The cubic root of 182138261 is about 566.8485785436.

The spelling of 182138261 in words is "one hundred eighty-two million, one hundred thirty-eight thousand, two hundred sixty-one".