51436815 has 32 divisors (see below), whose sum is σ = 89185536. Its totient is φ = 25213440.

The previous prime is 51436813. The next prime is 51436823. The reversal of 51436815 is 51863415.

51436815 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51436815 - 2¹ = 51436813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51436813) 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 31 ways as a sum of consecutive naturals, for example, 8620 + ... + 13310.

It is an arithmetic number, because the mean of its divisors is an integer number (2787048).

Almost surely, 2^51436815 is an apocalyptic number.

51436815 is a deficient number, since it is larger than the sum of its proper divisors (37748721).

51436815 is a wasteful number, since it uses less digits than its factorization.

51436815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4759.

The product of its digits is 14400, while the sum is 33.

The square root of 51436815 is about 7171.9463885336. The cubic root of 51436815 is about 371.8987251770.

Subtracting from 51436815 its product of digits (14400), we obtain a palindrome (51422415).

The spelling of 51436815 in words is "fifty-one million, four hundred thirty-six thousand, eight hundred fifteen".