51172751 has 8 divisors (see below), whose sum is σ = 58527744. Its totient is φ = 43828920.

The previous prime is 51172729. The next prime is 51172777. The reversal of 51172751 is 15727115.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51172751 - 2⁶ = 51172687 is a prime.

It is a Duffinian number.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13046 + ... + 16508.

It is an arithmetic number, because the mean of its divisors is an integer number (7315968).

Almost surely, 2^51172751 is an apocalyptic number.

51172751 is a deficient number, since it is larger than the sum of its proper divisors (7354993).

51172751 is a wasteful number, since it uses less digits than its factorization.

51172751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5581.

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

The square root of 51172751 is about 7153.5131928305. The cubic root of 51172751 is about 371.2612207003.

Adding to 51172751 its reverse (15727115), we get a palindrome (66899866).

The spelling of 51172751 in words is "fifty-one million, one hundred seventy-two thousand, seven hundred fifty-one".