47545081 has 4 divisors (see below), whose sum is σ = 48442212. Its totient is φ = 46647952.

The previous prime is 47545051. The next prime is 47545097. The reversal of 47545081 is 18054574.

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

It can be written as a sum of positive squares in 2 ways, for example, as 37015056 + 10530025 = 6084^2 + 3245^2 .

It is a cyclic number.

It is not a de Polignac number, because 47545081 - 2⁹ = 47544569 is a prime.

It is a super-2 number, since 2×47545081² = 4521069454593122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (47545021) 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, 448486 + ... + 448591.

It is an arithmetic number, because the mean of its divisors is an integer number (12110553).

Almost surely, 2^47545081 is an apocalyptic number.

It is an amenable number.

47545081 is a deficient number, since it is larger than the sum of its proper divisors (897131).

47545081 is an equidigital number, since it uses as much as digits as its factorization.

47545081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897130.

The product of its (nonzero) digits is 22400, while the sum is 34.

The square root of 47545081 is about 6895.2941199053. The cubic root of 47545081 is about 362.2723574318.

The spelling of 47545081 in words is "forty-seven million, five hundred forty-five thousand, eighty-one".