51283971 has 6 divisors (see below), whose sum is σ = 74076860. Its totient is φ = 34189308.

The previous prime is 51283963. The next prime is 51284017. The reversal of 51283971 is 17938215.

It is not a de Polignac number, because 51283971 - 2³ = 51283963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51283471) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2849101 + ... + 2849118.

Almost surely, 2^51283971 is an apocalyptic number.

51283971 is a deficient number, since it is larger than the sum of its proper divisors (22792889).

51283971 is a wasteful number, since it uses less digits than its factorization.

51283971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5698225 (or 5698222 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 51283971 is about 7161.2827761512. The cubic root of 51283971 is about 371.5299952172.

The spelling of 51283971 in words is "fifty-one million, two hundred eighty-three thousand, nine hundred seventy-one".