51025346520 has 64 divisors (see below), whose sum is σ = 158013987840. Its totient is φ = 13167830400.

The previous prime is 51025346497. The next prime is 51025346539. The reversal of 51025346520 is 2564352015.

It is a super-2 number, since 2×51025346520² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 6854526 + ... + 6861965.

It is an arithmetic number, because the mean of its divisors is an integer number (2468968560).

Almost surely, 2^51025346520 is an apocalyptic number.

It is an amenable number.

51025346520 is an abundant number, since it is smaller than the sum of its proper divisors (106988641320).

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

51025346520 is a wasteful number, since it uses less digits than its factorization.

51025346520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13716536 (or 13716532 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 51025346520 its reverse (2564352015), we get a palindrome (53589698535).

The spelling of 51025346520 in words is "fifty-one billion, twenty-five million, three hundred forty-six thousand, five hundred twenty".