181830465 has 12 divisors (see below), whose sum is σ = 315172884. Its totient is φ = 96976224.

The previous prime is 181830457. The next prime is 181830491. The reversal of 181830465 is 564038181.

181830465 is a `hidden beast` number, since 18 + 183 + 0 + 465 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 135699201 + 46131264 = 11649^2 + 6792^2 .

It is not a de Polignac number, because 181830465 - 2³ = 181830457 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2020294 + ... + 2020383.

It is an arithmetic number, because the mean of its divisors is an integer number (26264407).

Almost surely, 2^181830465 is an apocalyptic number.

181830465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

181830465 is a deficient number, since it is larger than the sum of its proper divisors (133342419).

181830465 is a wasteful number, since it uses less digits than its factorization.

181830465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4040688 (or 4040685 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 181830465 is about 13484.4527141445. The cubic root of 181830465 is about 566.5290921312.

The spelling of 181830465 in words is "one hundred eighty-one million, eight hundred thirty thousand, four hundred sixty-five".