51478371 has 18 divisors (see below), whose sum is σ = 86498412. Its totient is φ = 29415960.

The previous prime is 51478369. The next prime is 51478373. The reversal of 51478371 is 17387415.

51478371 is a `hidden beast` number, since 514 + 78 + 3 + 71 = 666.

It is an interprime number because it is at equal distance from previous prime (51478369) and next prime (51478373).

It is not a de Polignac number, because 51478371 - 2¹ = 51478369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51478373) 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, 57925 + ... + 58806.

Almost surely, 2^51478371 is an apocalyptic number.

51478371 is a deficient number, since it is larger than the sum of its proper divisors (35020041).

51478371 is a wasteful number, since it uses less digits than its factorization.

51478371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116751 (or 116741 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 51478371 is about 7174.8429251099. The cubic root of 51478371 is about 371.9988510197.

The spelling of 51478371 in words is "fifty-one million, four hundred seventy-eight thousand, three hundred seventy-one".