51172724 has 24 divisors (see below), whose sum is σ = 92077440. Its totient is φ = 24875136.

The previous prime is 51172721. The next prime is 51172727. The reversal of 51172724 is 42727115.

51172724 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51172721) and next prime (51172727).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51172721) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 19964 + ... + 22380.

It is an arithmetic number, because the mean of its divisors is an integer number (3836560).

Almost surely, 2^51172724 is an apocalyptic number.

It is an amenable number.

51172724 is a deficient number, since it is larger than the sum of its proper divisors (40904716).

51172724 is a wasteful number, since it uses less digits than its factorization.

51172724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2567 (or 2565 counting only the distinct ones).

The product of its digits is 3920, while the sum is 29.

The square root of 51172724 is about 7153.5113056456. The cubic root of 51172724 is about 371.2611554048.

Adding to 51172724 its reverse (42727115), we get a palindrome (93899839).

The spelling of 51172724 in words is "fifty-one million, one hundred seventy-two thousand, seven hundred twenty-four".