51447393 has 20 divisors (see below), whose sum is σ = 78646128. Its totient is φ = 33498360.

The previous prime is 51447391. The next prime is 51447437. The reversal of 51447393 is 39374415.

It is not a de Polignac number, because 51447393 - 2¹ = 51447391 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51447391) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3903 + ... + 10868.

Almost surely, 2^51447393 is an apocalyptic number.

It is an amenable number.

51447393 is a deficient number, since it is larger than the sum of its proper divisors (27198735).

51447393 is a wasteful number, since it uses less digits than its factorization.

51447393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14826 (or 14817 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 51447393 is about 7172.6838073346. The cubic root of 51447393 is about 371.9242171330.

The spelling of 51447393 in words is "fifty-one million, four hundred forty-seven thousand, three hundred ninety-three".