51507147 has 8 divisors (see below), whose sum is σ = 69114256. Its totient is φ = 34119072.

The previous prime is 51507133. The next prime is 51507173. The reversal of 51507147 is 74170515.

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

It is not a de Polignac number, because 51507147 - 2⁶ = 51507083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51507047) 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, 54208 + ... + 55149.

It is an arithmetic number, because the mean of its divisors is an integer number (8639282).

Almost surely, 2^51507147 is an apocalyptic number.

51507147 is a deficient number, since it is larger than the sum of its proper divisors (17607109).

51507147 is a wasteful number, since it uses less digits than its factorization.

51507147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109517.

The product of its (nonzero) digits is 4900, while the sum is 30.

The square root of 51507147 is about 7176.8479850140. The cubic root of 51507147 is about 372.0681529080.

The spelling of 51507147 in words is "fifty-one million, five hundred seven thousand, one hundred forty-seven".