181042019 has 6 divisors (see below), whose sum is σ = 185567100. Its totient is φ = 176624720.

The previous prime is 181041989. The next prime is 181042021. The reversal of 181042019 is 910240181.

It is a de Polignac number, because none of the positive numbers 2^k-181042019 is a prime.

It is a super-2 number, since 2×181042019² = 65552425287192722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181042049) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52169 + ... + 55530.

It is an arithmetic number, because the mean of its divisors is an integer number (30927850).

Almost surely, 2^181042019 is an apocalyptic number.

181042019 is a deficient number, since it is larger than the sum of its proper divisors (4525081).

181042019 is an equidigital number, since it uses as much as digits as its factorization.

181042019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107781 (or 107740 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 181042019 is about 13455.1855802884. The cubic root of 181042019 is about 565.7090521043.

The spelling of 181042019 in words is "one hundred eighty-one million, forty-two thousand, nineteen".