51329147 has 4 divisors (see below), whose sum is σ = 52032360. Its totient is φ = 50625936.

The previous prime is 51329129. The next prime is 51329153. The reversal of 51329147 is 74192315.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51329147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51329167) 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, 351497 + ... + 351642.

It is an arithmetic number, because the mean of its divisors is an integer number (13008090).

Almost surely, 2^51329147 is an apocalyptic number.

51329147 is a deficient number, since it is larger than the sum of its proper divisors (703213).

51329147 is an equidigital number, since it uses as much as digits as its factorization.

51329147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703212.

The product of its digits is 7560, while the sum is 32.

The square root of 51329147 is about 7164.4362653317. The cubic root of 51329147 is about 371.6390566695.

The spelling of 51329147 in words is "fifty-one million, three hundred twenty-nine thousand, one hundred forty-seven".