51125611 has 4 divisors (see below), whose sum is σ = 51147424. Its totient is φ = 51103800.

The previous prime is 51125597. The next prime is 51125617. The reversal of 51125611 is 11652115.

It is a happy number.

51125611 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11652115 = 5 ⋅2330423.

It is a cyclic number.

It is not a de Polignac number, because 51125611 - 2¹⁹ = 50601323 is a prime.

It is a super-2 number, since 2×51125611² = 5227656200246642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51125617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6900 + ... + 12241.

It is an arithmetic number, because the mean of its divisors is an integer number (12786856).

Almost surely, 2^51125611 is an apocalyptic number.

51125611 is a deficient number, since it is larger than the sum of its proper divisors (21813).

51125611 is a wasteful number, since it uses less digits than its factorization.

51125611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21812.

The product of its digits is 300, while the sum is 22.

The square root of 51125611 is about 7150.2175491379. The cubic root of 51125611 is about 371.1471845491.

Adding to 51125611 its reverse (11652115), we get a palindrome (62777726).

The spelling of 51125611 in words is "fifty-one million, one hundred twenty-five thousand, six hundred eleven".