51005020226500 has 24 divisors (see below), whose sum is σ = 111394964175768. Its totient is φ = 20402008090400.

The previous prime is 51005020226473. The next prime is 51005020226527. The reversal of 51005020226500 is 562202050015.

It is an interprime number because it is at equal distance from previous prime (51005020226473) and next prime (51005020226527).

It can be written as a sum of positive squares in 4 ways, for example, as 13855800186244 + 37149220040256 = 3722338^2 + 6095016^2 .

It is a super-2 number, since 2×51005020226500² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51005019727 + ... + 51005020726.

It is an arithmetic number, because the mean of its divisors is an integer number (4641456840657).

Almost surely, 2^{51005020226500} is an apocalyptic number.

51005020226500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51005020226500 is an abundant number, since it is smaller than the sum of its proper divisors (60389943949268).

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

51005020226500 is a wasteful number, since it uses less digits than its factorization.

51005020226500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102010040472 (or 102010040460 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

Adding to 51005020226500 its reverse (562202050015), we get a palindrome (51567222276515).

The spelling of 51005020226500 in words is "fifty-one trillion, five billion, twenty million, two hundred twenty-six thousand, five hundred".