51112361 has 4 divisors (see below), whose sum is σ = 51129300. Its totient is φ = 51095424.

The previous prime is 51112339. The next prime is 51112367. The reversal of 51112361 is 16321115.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8667136 + 42445225 = 2944^2 + 6515^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51112361 is a prime.

It is a super-2 number, since 2×51112361² = 5224946893988642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51112367) 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, 2576 + ... + 10433.

It is an arithmetic number, because the mean of its divisors is an integer number (12782325).

Almost surely, 2^51112361 is an apocalyptic number.

It is an amenable number.

51112361 is a deficient number, since it is larger than the sum of its proper divisors (16939).

51112361 is a wasteful number, since it uses less digits than its factorization.

51112361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16938.

The product of its digits is 180, while the sum is 20.

The square root of 51112361 is about 7149.2909438629. The cubic root of 51112361 is about 371.1151189171.

Adding to 51112361 its reverse (16321115), we get a palindrome (67433476).

The spelling of 51112361 in words is "fifty-one million, one hundred twelve thousand, three hundred sixty-one".