51325751 has 4 divisors (see below), whose sum is σ = 51366504. Its totient is φ = 51285000.

The previous prime is 51325741. The next prime is 51325753. The reversal of 51325751 is 15752315.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51325751 is a prime.

It is a super-4 number, since 4×51325751⁴ (a number of 32 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51325753) 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, 18425 + ... + 21026.

It is an arithmetic number, because the mean of its divisors is an integer number (12841626).

Almost surely, 2^51325751 is an apocalyptic number.

51325751 is a deficient number, since it is larger than the sum of its proper divisors (40753).

51325751 is a wasteful number, since it uses less digits than its factorization.

51325751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40752.

The product of its digits is 5250, while the sum is 29.

The square root of 51325751 is about 7164.1992574188. The cubic root of 51325751 is about 371.6308604551.

The spelling of 51325751 in words is "fifty-one million, three hundred twenty-five thousand, seven hundred fifty-one".