51165121510 has 64 divisors (see below), whose sum is σ = 99333563328. Its totient is φ = 18905001984.

The previous prime is 51165121507. The next prime is 51165121519. The reversal of 51165121510 is 1512156115.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51165121519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3146922 + ... + 3163138.

It is an arithmetic number, because the mean of its divisors is an integer number (1552086927).

Almost surely, 2^51165121510 is an apocalyptic number.

51165121510 is a deficient number, since it is larger than the sum of its proper divisors (48168441818).

51165121510 is a wasteful number, since it uses less digits than its factorization.

51165121510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16585.

The product of its (nonzero) digits is 1500, while the sum is 28.

Adding to 51165121510 its reverse (1512156115), we get a palindrome (52677277625).

It can be divided in two parts, 51 and 165121510, that added together give a palindrome (165121561).

The spelling of 51165121510 in words is "fifty-one billion, one hundred sixty-five million, one hundred twenty-one thousand, five hundred ten".