51172182 has 64 divisors (see below), whose sum is σ = 120657600. Its totient is φ = 16047360.

The previous prime is 51172133. The next prime is 51172249. The reversal of 51172182 is 28127115.

51172182 is a `hidden beast` number, since 511 + 72 + 1 + 82 = 666.

51172182 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51172182² = 5237184421282248, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63808 + ... + 64604.

It is an arithmetic number, because the mean of its divisors is an integer number (1885275).

Almost surely, 2^51172182 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51172182, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60328800).

51172182 is an abundant number, since it is smaller than the sum of its proper divisors (69485418).

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

51172182 is a wasteful number, since it uses less digits than its factorization.

51172182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878 (or 872 counting only the distinct ones).

The product of its digits is 1120, while the sum is 27.

The square root of 51172182 is about 7153.4734220517. The cubic root of 51172182 is about 371.2598446527.

Adding to 51172182 its reverse (28127115), we get a palindrome (79299297).

The spelling of 51172182 in words is "fifty-one million, one hundred seventy-two thousand, one hundred eighty-two".