51947 has 8 divisors (see below), whose sum is σ = 61152. Its totient is φ = 43200.

The previous prime is 51941. The next prime is 51949. The reversal of 51947 is 74915.

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

It is a cyclic number.

It is not a de Polignac number, because 51947 - 2⁸ = 51691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51941) 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, 197 + ... + 377.

It is an arithmetic number, because the mean of its divisors is an integer number (7644).

2⁵¹⁹⁴⁷ is an apocalyptic number.

51947 is a deficient number, since it is larger than the sum of its proper divisors (9205).

51947 is a wasteful number, since it uses less digits than its factorization.

51947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229.

The product of its digits is 1260, while the sum is 26.

The square root of 51947 is about 227.9188452059. The cubic root of 51947 is about 37.3124262901.

The spelling of 51947 in words is "fifty-one thousand, nine hundred forty-seven".