51227751 has 8 divisors (see below), whose sum is σ = 68713344. Its totient is φ = 33947000.

The previous prime is 51227723. The next prime is 51227767. The reversal of 51227751 is 15772215.

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 51227751 - 2⁵ = 51227719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51227051) 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, 50625 + ... + 51626.

It is an arithmetic number, because the mean of its divisors is an integer number (8589168).

Almost surely, 2^51227751 is an apocalyptic number.

51227751 is a deficient number, since it is larger than the sum of its proper divisors (17485593).

51227751 is a wasteful number, since it uses less digits than its factorization.

51227751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102421.

The product of its digits is 4900, while the sum is 30.

The square root of 51227751 is about 7157.3564253850. The cubic root of 51227751 is about 371.3941824530.

Adding to 51227751 its reverse (15772215), we get a palindrome (66999966).

The spelling of 51227751 in words is "fifty-one million, two hundred twenty-seven thousand, seven hundred fifty-one".