51284277 has 18 divisors (see below), whose sum is σ = 81425526. Its totient is φ = 31080720.

The previous prime is 51284269. The next prime is 51284309. The reversal of 51284277 is 77248215.

It can be written as a sum of positive squares in only one way, i.e., 51279921 + 4356 = 7161^2 + 66^2 .

It is not a de Polignac number, because 51284277 - 2³ = 51284269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51284237) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 22458 + ... + 24635.

Almost surely, 2^51284277 is an apocalyptic number.

It is an amenable number.

51284277 is a deficient number, since it is larger than the sum of its proper divisors (30141249).

51284277 is a wasteful number, since it uses less digits than its factorization.

51284277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47121 (or 47107 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 51284277 is about 7161.3041410067. The cubic root of 51284277 is about 371.5307341612.

The spelling of 51284277 in words is "fifty-one million, two hundred eighty-four thousand, two hundred seventy-seven".