182145881 has 2 divisors, whose sum is σ = 182145882. Its totient is φ = 182145880.

The previous prime is 182145853. The next prime is 182145883. The reversal of 182145881 is 188541281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136515856 + 45630025 = 11684^2 + 6755^2 .

It is a cyclic number.

It is not a de Polignac number, because 182145881 - 2²² = 177951577 is a prime.

It is a super-2 number, since 2×182145881² = 66354243930532322, which contains 22 as substring.

Together with 182145883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (182145883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 91072940 + 91072941.

It is an arithmetic number, because the mean of its divisors is an integer number (91072941).

Almost surely, 2^182145881 is an apocalyptic number.

It is an amenable number.

182145881 is a deficient number, since it is larger than the sum of its proper divisors (1).

182145881 is an equidigital number, since it uses as much as digits as its factorization.

182145881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20480, while the sum is 38.

The square root of 182145881 is about 13496.1431898154. The cubic root of 182145881 is about 566.8564833918.

The spelling of 182145881 in words is "one hundred eighty-two million, one hundred forty-five thousand, eight hundred eighty-one".