51273894 has 96 divisors (see below), whose sum is σ = 128373120. Its totient is φ = 13571712.

The previous prime is 51273889. The next prime is 51273899. The reversal of 51273894 is 49837215.

It is an interprime number because it is at equal distance from previous prime (51273889) and next prime (51273899).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51273899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 374194 + ... + 374330.

It is an arithmetic number, because the mean of its divisors is an integer number (1337220).

Almost surely, 2^51273894 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51273894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64186560).

51273894 is an abundant number, since it is smaller than the sum of its proper divisors (77099226).

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

51273894 is a wasteful number, since it uses less digits than its factorization.

51273894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242 (or 235 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 51273894 is about 7160.5791665200. The cubic root of 51273894 is about 371.5056591337.

The spelling of 51273894 in words is "fifty-one million, two hundred seventy-three thousand, eight hundred ninety-four".