51214215 has 64 divisors (see below), whose sum is σ = 97090560. Its totient is φ = 22809600.

The previous prime is 51214213. The next prime is 51214223. The reversal of 51214215 is 51241215.

It is not a de Polignac number, because 51214215 - 2¹ = 51214213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51214191 and 51214200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51214211) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 84915 + ... + 85515.

It is an arithmetic number, because the mean of its divisors is an integer number (1517040).

Almost surely, 2^51214215 is an apocalyptic number.

51214215 is a deficient number, since it is larger than the sum of its proper divisors (45876345).

51214215 is a wasteful number, since it uses less digits than its factorization.

51214215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664.

The product of its digits is 400, while the sum is 21.

The square root of 51214215 is about 7156.4107623864. The cubic root of 51214215 is about 371.3614681890.

Subtracting 51214215 from its reverse (51241215), we obtain a cube (27000 = 30³).

The spelling of 51214215 in words is "fifty-one million, two hundred fourteen thousand, two hundred fifteen".