181450047 has 4 divisors (see below), whose sum is σ = 241933400. Its totient is φ = 120966696.

The previous prime is 181450001. The next prime is 181450063. The reversal of 181450047 is 740054181.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 181450047 - 2¹¹ = 181447999 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 181449996 and 181450023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181455047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30241672 + ... + 30241677.

It is an arithmetic number, because the mean of its divisors is an integer number (60483350).

Almost surely, 2^181450047 is an apocalyptic number.

181450047 is a deficient number, since it is larger than the sum of its proper divisors (60483353).

181450047 is an equidigital number, since it uses as much as digits as its factorization.

181450047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60483352.

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 181450047 is about 13470.3395280149. The cubic root of 181450047 is about 566.1337268877.

The spelling of 181450047 in words is "one hundred eighty-one million, four hundred fifty thousand, forty-seven".