181042463 has 4 divisors (see below), whose sum is σ = 206905680. Its totient is φ = 155179248.

The previous prime is 181042423. The next prime is 181042471. The reversal of 181042463 is 364240181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 364240181 = 17 ⋅21425893.

It is not a de Polignac number, because 181042463 - 2⁸ = 181042207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181042423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12931598 + ... + 12931611.

It is an arithmetic number, because the mean of its divisors is an integer number (51726420).

Almost surely, 2^181042463 is an apocalyptic number.

181042463 is a deficient number, since it is larger than the sum of its proper divisors (25863217).

181042463 is an equidigital number, since it uses as much as digits as its factorization.

181042463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25863216.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 181042463 is about 13455.2020794933. The cubic root of 181042463 is about 565.7095145653.

The spelling of 181042463 in words is "one hundred eighty-one million, forty-two thousand, four hundred sixty-three".