51393147 has 8 divisors (see below), whose sum is σ = 73795344. Its totient is φ = 31626528.

The previous prime is 51393113. The next prime is 51393161. The reversal of 51393147 is 74139315.

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

It is not a de Polignac number, because 51393147 - 2¹¹ = 51391099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51393107) 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, 658848 + ... + 658925.

It is an arithmetic number, because the mean of its divisors is an integer number (9224418).

Almost surely, 2^51393147 is an apocalyptic number.

51393147 is a deficient number, since it is larger than the sum of its proper divisors (22402197).

51393147 is a wasteful number, since it uses less digits than its factorization.

51393147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317789.

The product of its digits is 11340, while the sum is 33.

The square root of 51393147 is about 7168.9013802674. The cubic root of 51393147 is about 371.7934525142.

The spelling of 51393147 in words is "fifty-one million, three hundred ninety-three thousand, one hundred forty-seven".