51325231500 has 96 divisors (see below), whose sum is σ = 166065681600. Its totient is φ = 13686724800.

The previous prime is 51325231493. The next prime is 51325231537. The reversal of 51325231500 is 513252315.

It is a happy number.

51325231500 is a `hidden beast` number, since 5 + 132 + 5 + 23 + 1 + 500 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1887435 + ... + 1914434.

It is an arithmetic number, because the mean of its divisors is an integer number (1729850850).

Almost surely, 2^51325231500 is an apocalyptic number.

51325231500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51325231500 is an abundant number, since it is smaller than the sum of its proper divisors (114740450100).

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

51325231500 is a wasteful number, since it uses less digits than its factorization.

51325231500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3801897 (or 3801879 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

Adding to 51325231500 its reverse (513252315), we get a palindrome (51838483815).

51325231500 divided by its reverse (513252315) gives a square (100 = 10²).

The spelling of 51325231500 in words is "fifty-one billion, three hundred twenty-five million, two hundred thirty-one thousand, five hundred".