51227173 has 4 divisors (see below), whose sum is σ = 53923360. Its totient is φ = 48530988.

The previous prime is 51227161. The next prime is 51227179. The reversal of 51227173 is 37172215.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37172215 = 5 ⋅7434443.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51227173 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 (51227179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1348065 + ... + 1348102.

It is an arithmetic number, because the mean of its divisors is an integer number (13480840).

Almost surely, 2^51227173 is an apocalyptic number.

It is an amenable number.

51227173 is a deficient number, since it is larger than the sum of its proper divisors (2696187).

51227173 is a wasteful number, since it uses less digits than its factorization.

51227173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2696186.

The product of its digits is 2940, while the sum is 28.

The square root of 51227173 is about 7157.3160472345. The cubic root of 51227173 is about 371.3927856408.

Adding to 51227173 its reverse (37172215), we get a palindrome (88399388).

The spelling of 51227173 in words is "fifty-one million, two hundred twenty-seven thousand, one hundred seventy-three".