51125215000 has 40 divisors (see below), whose sum is σ = 119786390460. Its totient is φ = 20450084000.

The previous prime is 51125214997. The next prime is 51125215007. The reversal of 51125215000 is 51252115.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×51125215000² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51125215007) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5107522 + ... + 5117521.

Almost surely, 2^51125215000 is an apocalyptic number.

51125215000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51125215000 is an abundant number, since it is smaller than the sum of its proper divisors (68661175460).

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

51125215000 is a wasteful number, since it uses less digits than its factorization.

51125215000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10225069 (or 10225050 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 22.

Adding to 51125215000 its reverse (51252115), we get a palindrome (51176467115).

The spelling of 51125215000 in words is "fifty-one billion, one hundred twenty-five million, two hundred fifteen thousand".