51159047 has 4 divisors (see below), whose sum is σ = 51221736. Its totient is φ = 51096360.

The previous prime is 51159013. The next prime is 51159079. The reversal of 51159047 is 74095115.

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

It is a cyclic number.

It is not a de Polignac number, because 51159047 - 2⁸ = 51158791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51155047) 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, 30104 + ... + 31757.

It is an arithmetic number, because the mean of its divisors is an integer number (12805434).

Almost surely, 2^51159047 is an apocalyptic number.

51159047 is a deficient number, since it is larger than the sum of its proper divisors (62689).

51159047 is an equidigital number, since it uses as much as digits as its factorization.

51159047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62688.

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 51159047 is about 7152.5552776613. Note that the first 3 decimals coincide. The cubic root of 51159047 is about 371.2280766415.

The spelling of 51159047 in words is "fifty-one million, one hundred fifty-nine thousand, forty-seven".