51271215 has 16 divisors (see below), whose sum is σ = 86352000. Its totient is φ = 25905312.

The previous prime is 51271211. The next prime is 51271223. The reversal of 51271215 is 51217215.

It is not a de Polignac number, because 51271215 - 2² = 51271211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51271211) 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, 89665 + ... + 90234.

It is an arithmetic number, because the mean of its divisors is an integer number (5397000).

Almost surely, 2^51271215 is an apocalyptic number.

51271215 is a deficient number, since it is larger than the sum of its proper divisors (35080785).

51271215 is a wasteful number, since it uses less digits than its factorization.

51271215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179926.

The product of its digits is 700, while the sum is 24.

The square root of 51271215 is about 7160.3920982024. The cubic root of 51271215 is about 371.4991887780.

The spelling of 51271215 in words is "fifty-one million, two hundred seventy-one thousand, two hundred fifteen".