51278214 has 16 divisors (see below), whose sum is σ = 110445552. Its totient is φ = 15777888.

The previous prime is 51278197. The next prime is 51278219. The reversal of 51278214 is 41287215.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51278219) 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, 328629 + ... + 328784.

It is an arithmetic number, because the mean of its divisors is an integer number (6902847).

Almost surely, 2^51278214 is an apocalyptic number.

51278214 is an abundant number, since it is smaller than the sum of its proper divisors (59167338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51278214 is a wasteful number, since it uses less digits than its factorization.

51278214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657431.

The product of its digits is 4480, while the sum is 30.

The square root of 51278214 is about 7160.8808117438. The cubic root of 51278214 is about 371.5160923792.

Subtracting from 51278214 its reverse (41287215), we obtain a palindrome (9990999).

The spelling of 51278214 in words is "fifty-one million, two hundred seventy-eight thousand, two hundred fourteen".