51173125 has 20 divisors (see below), whose sum is σ = 65538396. Its totient is φ = 39920000.

The previous prime is 51173123. The next prime is 51173149. The reversal of 51173125 is 52137115.

It can be written as a sum of positive squares in 10 ways, for example, as 50722884 + 450241 = 7122^2 + 671^2 .

It is not a de Polignac number, because 51173125 - 2¹ = 51173123 is a prime.

It is a super-3 number, since 3×51173125³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51173125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51173123) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 24627 + ... + 26623.

Almost surely, 2^51173125 is an apocalyptic number.

It is an amenable number.

51173125 is a deficient number, since it is larger than the sum of its proper divisors (14365271).

51173125 is an equidigital number, since it uses as much as digits as its factorization.

51173125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2058 (or 2043 counting only the distinct ones).

The product of its digits is 1050, while the sum is 25.

The square root of 51173125 is about 7153.5393337844. The cubic root of 51173125 is about 371.2621251618.

The spelling of 51173125 in words is "fifty-one million, one hundred seventy-three thousand, one hundred twenty-five".