51515540455250 has 128 divisors (see below), whose sum is σ = 102443792256000. Its totient is φ = 19358003596800.

The previous prime is 51515540455231. The next prime is 51515540455277. The reversal of 51515540455250 is 5255404551515.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51515540455195 and 51515540455204.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 75912947 + ... + 76588553.

It is an arithmetic number, because the mean of its divisors is an integer number (800342127000).

Almost surely, 2^{51515540455250} is an apocalyptic number.

51515540455250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51515540455250 is a deficient number, since it is larger than the sum of its proper divisors (50928251800750).

51515540455250 is a wasteful number, since it uses less digits than its factorization.

51515540455250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675885 (or 675875 counting only the distinct ones).

The product of its (nonzero) digits is 2500000, while the sum is 47.

The spelling of 51515540455250 in words is "fifty-one trillion, five hundred fifteen billion, five hundred forty million, four hundred fifty-five thousand, two hundred fifty".