51589947 has 4 divisors (see below), whose sum is σ = 68786600. Its totient is φ = 34393296.

The previous prime is 51589939. The next prime is 51589961. The reversal of 51589947 is 74998515.

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

It is not a de Polignac number, because 51589947 - 2³ = 51589939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51589896 and 51589905.

It is not an unprimeable number, because it can be changed into a prime (51589907) 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, 8598322 + ... + 8598327.

It is an arithmetic number, because the mean of its divisors is an integer number (17196650).

Almost surely, 2^51589947 is an apocalyptic number.

51589947 is a deficient number, since it is larger than the sum of its proper divisors (17196653).

51589947 is a wasteful number, since it uses less digits than its factorization.

51589947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17196652.

The product of its digits is 453600, while the sum is 48.

The square root of 51589947 is about 7182.6142176787. The cubic root of 51589947 is about 372.2674181335.

The spelling of 51589947 in words is "fifty-one million, five hundred eighty-nine thousand, nine hundred forty-seven".