51151772 has 12 divisors (see below), whose sum is σ = 102303600. Its totient is φ = 21922176.

The previous prime is 51151769. The next prime is 51151783. The reversal of 51151772 is 27715115.

51151772 is an admirable number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 913397 + ... + 913452.

It is an arithmetic number, because the mean of its divisors is an integer number (8525300).

Almost surely, 2^51151772 is an apocalyptic number.

It is an amenable number.

51151772 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51151772 is a wasteful number, since it uses less digits than its factorization.

51151772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1826860 (or 1826858 counting only the distinct ones).

The product of its digits is 2450, while the sum is 29.

The square root of 51151772 is about 7152.0467000712. The cubic root of 51151772 is about 371.2104791526.

Adding to 51151772 its reverse (27715115), we get a palindrome (78866887).

The spelling of 51151772 in words is "fifty-one million, one hundred fifty-one thousand, seven hundred seventy-two".