51142287 has 16 divisors (see below), whose sum is σ = 78163200. Its totient is φ = 29137152.

The previous prime is 51142277. The next prime is 51142303. The reversal of 51142287 is 78224115.

It is not a de Polignac number, because 51142287 - 2⁸ = 51142031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51142207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3964 + ... + 10862.

It is an arithmetic number, because the mean of its divisors is an integer number (4885200).

Almost surely, 2^51142287 is an apocalyptic number.

51142287 is a deficient number, since it is larger than the sum of its proper divisors (27020913).

51142287 is a wasteful number, since it uses less digits than its factorization.

51142287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7262.

The product of its digits is 4480, while the sum is 30.

The square root of 51142287 is about 7151.3835724285. The cubic root of 51142287 is about 371.1875333914.

The spelling of 51142287 in words is "fifty-one million, one hundred forty-two thousand, two hundred eighty-seven".