51401286 has 48 divisors (see below), whose sum is σ = 115734528. Its totient is φ = 16470000.

The previous prime is 51401279. The next prime is 51401299. The reversal of 51401286 is 68210415.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 139875 + ... + 140241.

It is an arithmetic number, because the mean of its divisors is an integer number (2411136).

Almost surely, 2^51401286 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51401286, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57867264).

51401286 is an abundant number, since it is smaller than the sum of its proper divisors (64333242).

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

51401286 is a wasteful number, since it uses less digits than its factorization.

51401286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657 (or 654 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 51401286 is about 7169.4690179957. The cubic root of 51401286 is about 371.8130781346.

The spelling of 51401286 in words is "fifty-one million, four hundred one thousand, two hundred eighty-six".