51775146 has 64 divisors (see below), whose sum is σ = 120130560. Its totient is φ = 16511040.

The previous prime is 51775123. The next prime is 51775193. The reversal of 51775146 is 64157715.

It is a self number, because there is not a number n which added to its sum of digits gives 51775146.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 262720 + ... + 262916.

It is an arithmetic number, because the mean of its divisors is an integer number (1877040).

Almost surely, 2^51775146 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51775146, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60065280).

51775146 is an abundant number, since it is smaller than the sum of its proper divisors (68355414).

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

51775146 is a wasteful number, since it uses less digits than its factorization.

51775146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396 (or 390 counting only the distinct ones).

The product of its digits is 29400, while the sum is 36.

The square root of 51775146 is about 7195.4948405235. The cubic root of 51775146 is about 372.7123447341.

The spelling of 51775146 in words is "fifty-one million, seven hundred seventy-five thousand, one hundred forty-six".