51023310500 has 48 divisors (see below), whose sum is σ = 115277526000. Its totient is φ = 19705548800.

The previous prime is 51023310491. The next prime is 51023310517. The reversal of 51023310500 is 501332015.

It can be written as a sum of positive squares in 8 ways, for example, as 18056371876 + 32966938624 = 134374^2 + 181568^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1744925 + ... + 1773924.

It is an arithmetic number, because the mean of its divisors is an integer number (2401615125).

Almost surely, 2^51023310500 is an apocalyptic number.

51023310500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51023310500 is an abundant number, since it is smaller than the sum of its proper divisors (64254215500).

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

51023310500 is a wasteful number, since it uses less digits than its factorization.

51023310500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3518897 (or 3518885 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 20.

Adding to 51023310500 its reverse (501332015), we get a palindrome (51524642515).

The spelling of 51023310500 in words is "fifty-one billion, twenty-three million, three hundred ten thousand, five hundred".