51140215 has 16 divisors (see below), whose sum is σ = 70500672. Its totient is φ = 34884864.

The previous prime is 51140213. The next prime is 51140231. The reversal of 51140215 is 51204115.

It is not a de Polignac number, because 51140215 - 2¹ = 51140213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51140192 and 51140201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51140213) 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, 3187 + ... + 10603.

It is an arithmetic number, because the mean of its divisors is an integer number (4406292).

Almost surely, 2^51140215 is an apocalyptic number.

51140215 is a deficient number, since it is larger than the sum of its proper divisors (19360457).

51140215 is a wasteful number, since it uses less digits than its factorization.

51140215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7626.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 51140215 is about 7151.2387038890. The cubic root of 51140215 is about 371.1825205080.

It can be divided in two parts, 5 and 1140215, that multiplied together give a palindrome (5701075).

The spelling of 51140215 in words is "fifty-one million, one hundred forty thousand, two hundred fifteen".