47845451 has 4 divisors (see below), whose sum is σ = 49925712. Its totient is φ = 45765192.

The previous prime is 47845381. The next prime is 47845487. The reversal of 47845451 is 15454874.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15454874 = 2 ⋅7727437.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47845451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47845151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1040096 + ... + 1040141.

It is an arithmetic number, because the mean of its divisors is an integer number (12481428).

Almost surely, 2^47845451 is an apocalyptic number.

47845451 is a deficient number, since it is larger than the sum of its proper divisors (2080261).

47845451 is a wasteful number, since it uses less digits than its factorization.

47845451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2080260.

The product of its digits is 89600, while the sum is 38.

The square root of 47845451 is about 6917.0406244289. The cubic root of 47845451 is about 363.0336517358.

The spelling of 47845451 in words is "forty-seven million, eight hundred forty-five thousand, four hundred fifty-one".