51421214 has 16 divisors (see below), whose sum is σ = 84475440. Its totient is φ = 23329920.

The previous prime is 51421213. The next prime is 51421217. The reversal of 51421214 is 41212415.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51421213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15227 + ... + 18294.

It is an arithmetic number, because the mean of its divisors is an integer number (5279715).

Almost surely, 2^51421214 is an apocalyptic number.

51421214 is a deficient number, since it is larger than the sum of its proper divisors (33054226).

51421214 is a wasteful number, since it uses less digits than its factorization.

51421214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33595.

The product of its digits is 320, while the sum is 20.

The square root of 51421214 is about 7170.8586654598. The cubic root of 51421214 is about 371.8611218981.

Adding to 51421214 its reverse (41212415), we get a palindrome (92633629).

The spelling of 51421214 in words is "fifty-one million, four hundred twenty-one thousand, two hundred fourteen".