51805062 has 64 divisors (see below), whose sum is σ = 122549760. Its totient is φ = 16185312.

The previous prime is 51805051. The next prime is 51805093. The reversal of 51805062 is 26050815.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65433 + ... + 66219.

It is an arithmetic number, because the mean of its divisors is an integer number (1914840).

Almost surely, 2^51805062 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51805062, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61274880).

51805062 is an abundant number, since it is smaller than the sum of its proper divisors (70744698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51805062 is a wasteful number, since it uses less digits than its factorization.

51805062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874 (or 868 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 51805062 is about 7197.5733410643. The cubic root of 51805062 is about 372.7841160796.

Adding to 51805062 its reverse (26050815), we get a palindrome (77855877).

The spelling of 51805062 in words is "fifty-one million, eight hundred five thousand, sixty-two".