51012361 has 4 divisors (see below), whose sum is σ = 51384852. Its totient is φ = 50639872.

The previous prime is 51012301. The next prime is 51012389. The reversal of 51012361 is 16321015.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16321015 = 5 ⋅3264203.

It can be written as a sum of positive squares in 2 ways, for example, as 28686736 + 22325625 = 5356^2 + 4725^2 .

It is a cyclic number.

It is not a de Polignac number, because 51012361 - 2¹¹ = 51010313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51012301) 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, 186040 + ... + 186313.

It is an arithmetic number, because the mean of its divisors is an integer number (12846213).

Almost surely, 2^51012361 is an apocalyptic number.

It is an amenable number.

51012361 is a deficient number, since it is larger than the sum of its proper divisors (372491).

51012361 is a wasteful number, since it uses less digits than its factorization.

51012361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372490.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 51012361 is about 7142.2938192152. The cubic root of 51012361 is about 370.8729352256.

Adding to 51012361 its reverse (16321015), we get a palindrome (67333376).

The spelling of 51012361 in words is "fifty-one million, twelve thousand, three hundred sixty-one".