51272187 has 16 divisors (see below), whose sum is σ = 72773280. Its totient is φ = 31997952.

The previous prime is 51272167. The next prime is 51272189. The reversal of 51272187 is 78127215.

It is not a de Polignac number, because 51272187 - 2⁸ = 51271931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51272189) 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, 7239 + ... + 12447.

It is an arithmetic number, because the mean of its divisors is an integer number (4548330).

Almost surely, 2^51272187 is an apocalyptic number.

51272187 is a deficient number, since it is larger than the sum of its proper divisors (21501093).

51272187 is a wasteful number, since it uses less digits than its factorization.

51272187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5422.

The product of its digits is 7840, while the sum is 33.

The square root of 51272187 is about 7160.4599712588. The cubic root of 51272187 is about 371.5015363911.

The spelling of 51272187 in words is "fifty-one million, two hundred seventy-two thousand, one hundred eighty-seven".