51709147 has 8 divisors (see below), whose sum is σ = 61002752. Its totient is φ = 42892200.

The previous prime is 51709123. The next prime is 51709153. The reversal of 51709147 is 74190715.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51709147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51709157) 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, 118929 + ... + 119362.

It is an arithmetic number, because the mean of its divisors is an integer number (7625344).

Almost surely, 2^51709147 is an apocalyptic number.

51709147 is a deficient number, since it is larger than the sum of its proper divisors (9293605).

51709147 is a wasteful number, since it uses less digits than its factorization.

51709147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238329.

The product of its (nonzero) digits is 8820, while the sum is 34.

The square root of 51709147 is about 7190.9072445694. The cubic root of 51709147 is about 372.5539089883.

The spelling of 51709147 in words is "fifty-one million, seven hundred nine thousand, one hundred forty-seven".