181982051 has 2 divisors, whose sum is σ = 181982052. Its totient is φ = 181982050.

The previous prime is 181982023. The next prime is 181982081. The reversal of 181982051 is 150289181.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181982051 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (181982011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90991025 + 90991026.

It is an arithmetic number, because the mean of its divisors is an integer number (90991026).

Almost surely, 2^181982051 is an apocalyptic number.

181982051 is a deficient number, since it is larger than the sum of its proper divisors (1).

181982051 is an equidigital number, since it uses as much as digits as its factorization.

181982051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 35.

The square root of 181982051 is about 13490.0723126305. The cubic root of 181982051 is about 566.6864805452.

The spelling of 181982051 in words is "one hundred eighty-one million, nine hundred eighty-two thousand, fifty-one".