47451 has 4 divisors (see below), whose sum is σ = 63272. Its totient is φ = 31632.

The previous prime is 47441. The next prime is 47459. The reversal of 47451 is 15474.

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

It is not a de Polignac number, because 47451 - 2⁵ = 47419 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47459) 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, 7906 + ... + 7911.

It is an arithmetic number, because the mean of its divisors is an integer number (15818).

2⁴⁷⁴⁵¹ is an apocalyptic number.

47451 is a deficient number, since it is larger than the sum of its proper divisors (15821).

47451 is a wasteful number, since it uses less digits than its factorization.

47451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15820.

The product of its digits is 560, while the sum is 21.

The square root of 47451 is about 217.8325044616. The cubic root of 47451 is about 36.2033247865.

It can be divided in two parts, 474 and 51, that added together give a palindrome (525).

The spelling of 47451 in words is "forty-seven thousand, four hundred fifty-one".