51867774 has 96 divisors (see below), whose sum is σ = 135782400. Its totient is φ = 14288400.

The previous prime is 51867757. The next prime is 51867787. The reversal of 51867774 is 47776815.

51867774 is a `hidden beast` number, since 518 + 67 + 7 + 74 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 191259 + ... + 191529.

It is an arithmetic number, because the mean of its divisors is an integer number (1414400).

Almost surely, 2^51867774 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51867774, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67891200).

51867774 is an abundant number, since it is smaller than the sum of its proper divisors (83914626).

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

51867774 is a wasteful number, since it uses less digits than its factorization.

51867774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331 (or 314 counting only the distinct ones).

The product of its digits is 329280, while the sum is 45.

The square root of 51867774 is about 7201.9284917305. The cubic root of 51867774 is about 372.9344785447.

The spelling of 51867774 in words is "fifty-one million, eight hundred sixty-seven thousand, seven hundred seventy-four".