51805061 has 24 divisors (see below), whose sum is σ = 67210752. Its totient is φ = 39045600.

The previous prime is 51805051. The next prime is 51805093. The reversal of 51805061 is 16050815.

It is not a de Polignac number, because 51805061 - 2⁶ = 51804997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51805061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51805051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25271 + ... + 27243.

It is an arithmetic number, because the mean of its divisors is an integer number (2800448).

Almost surely, 2^51805061 is an apocalyptic number.

It is an amenable number.

51805061 is a deficient number, since it is larger than the sum of its proper divisors (15405691).

51805061 is a wasteful number, since it uses less digits than its factorization.

51805061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2033 (or 2022 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 51805061 is about 7197.5732715965. The cubic root of 51805061 is about 372.7841136809.

Adding to 51805061 its reverse (16050815), we get a palindrome (67855876).

The spelling of 51805061 in words is "fifty-one million, eight hundred five thousand, sixty-one".