51185466 has 64 divisors (see below), whose sum is σ = 118742400. Its totient is φ = 16329600.

The previous prime is 51185441. The next prime is 51185479. The reversal of 51185466 is 66458115.

51185466 is a `hidden beast` number, since 511 + 85 + 4 + 66 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 51185466.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134865 + ... + 135243.

It is an arithmetic number, because the mean of its divisors is an integer number (1855350).

Almost surely, 2^51185466 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51185466, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59371200).

51185466 is an abundant number, since it is smaller than the sum of its proper divisors (67556934).

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

51185466 is a wasteful number, since it uses less digits than its factorization.

51185466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492 (or 486 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 51185466 is about 7154.4018617911. The cubic root of 51185466 is about 371.2919675034.

The spelling of 51185466 in words is "fifty-one million, one hundred eighty-five thousand, four hundred sixty-six".