181530541 has 8 divisors (see below), whose sum is σ = 193233600. Its totient is φ = 170042400.

The previous prime is 181530509. The next prime is 181530581. The reversal of 181530541 is 145035181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 181530541 - 2⁵ = 181530509 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 (181530581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51985 + ... + 55366.

It is an arithmetic number, because the mean of its divisors is an integer number (24154200).

Almost surely, 2^181530541 is an apocalyptic number.

It is an amenable number.

181530541 is a deficient number, since it is larger than the sum of its proper divisors (11703059).

181530541 is a wasteful number, since it uses less digits than its factorization.

181530541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107459.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 181530541 is about 13473.3270204504. The cubic root of 181530541 is about 566.2174296883.

The spelling of 181530541 in words is "one hundred eighty-one million, five hundred thirty thousand, five hundred forty-one".