51205302534 has 32 divisors (see below), whose sum is σ = 104627759616. Its totient is φ = 16699173920.

The previous prime is 51205302517. The next prime is 51205302553. The reversal of 51205302534 is 43520350215.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 775069 + ... + 838535.

It is an arithmetic number, because the mean of its divisors is an integer number (3269617488).

Almost surely, 2^51205302534 is an apocalyptic number.

51205302534 is an abundant number, since it is smaller than the sum of its proper divisors (53422457082).

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

51205302534 is a wasteful number, since it uses less digits than its factorization.

51205302534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66380.

The product of its (nonzero) digits is 18000, while the sum is 30.

Adding to 51205302534 its reverse (43520350215), we get a palindrome (94725652749).

The spelling of 51205302534 in words is "fifty-one billion, two hundred five million, three hundred two thousand, five hundred thirty-four".