51003325540 has 48 divisors (see below), whose sum is σ = 113517331200. Its totient is φ = 19182638592.

The previous prime is 51003325517. The next prime is 51003325543. The reversal of 51003325540 is 4552330015.

It is a super-2 number, since 2×51003325540² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51003325499 and 51003325508.

It is not an unprimeable number, because it can be changed into a prime (51003325543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 281071 + ... + 425449.

It is an arithmetic number, because the mean of its divisors is an integer number (2364944400).

Almost surely, 2^51003325540 is an apocalyptic number.

It is an amenable number.

51003325540 is an abundant number, since it is smaller than the sum of its proper divisors (62514005660).

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

51003325540 is a wasteful number, since it uses less digits than its factorization.

51003325540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145444 (or 145442 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 28.

Adding to 51003325540 its reverse (4552330015), we get a palindrome (55555655555).

The spelling of 51003325540 in words is "fifty-one billion, three million, three hundred twenty-five thousand, five hundred forty".