51102326550 has 48 divisors (see below), whose sum is σ = 138255026112. Its totient is φ = 12388442400.

The previous prime is 51102326549. The next prime is 51102326563. The reversal of 51102326550 is 5562320115.

It is a happy number.

It is a super-2 number, since 2×51102326550² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15483904 + ... + 15487203.

It is an arithmetic number, because the mean of its divisors is an integer number (2880313044).

Almost surely, 2^51102326550 is an apocalyptic number.

51102326550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51102326550 is an abundant number, since it is smaller than the sum of its proper divisors (87152699562).

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

51102326550 is a wasteful number, since it uses less digits than its factorization.

51102326550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30971133 (or 30971128 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 51102326550 its reverse (5562320115), we get a palindrome (56664646665).

The spelling of 51102326550 in words is "fifty-one billion, one hundred two million, three hundred twenty-six thousand, five hundred fifty".