51312214 has 4 divisors (see below), whose sum is σ = 76968324. Its totient is φ = 25656106.

The previous prime is 51312187. The next prime is 51312221. The reversal of 51312214 is 41221315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41221315 = 5 ⋅8244263.

It is a junction number, because it is equal to n+sod(n) for n = 51312191 and 51312200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12828052 + ... + 12828055.

It is an arithmetic number, because the mean of its divisors is an integer number (19242081).

Almost surely, 2^51312214 is an apocalyptic number.

51312214 is a deficient number, since it is larger than the sum of its proper divisors (25656110).

51312214 is a wasteful number, since it uses less digits than its factorization.

51312214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25656109.

The product of its digits is 240, while the sum is 19.

The square root of 51312214 is about 7163.2544279817. The cubic root of 51312214 is about 371.5981854385.

Adding to 51312214 its reverse (41221315), we get a palindrome (92533529).

The spelling of 51312214 in words is "fifty-one million, three hundred twelve thousand, two hundred fourteen".