51530203515 has 16 divisors (see below), whose sum is σ = 94226658048. Its totient is φ = 23556664416.

The previous prime is 51530203493. The next prime is 51530203541.

51530203515 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 51530203515 - 2²⁷ = 51395985787 is a prime.

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, 245381817 + ... + 245382026.

It is an arithmetic number, because the mean of its divisors is an integer number (5889166128).

Almost surely, 2^51530203515 is an apocalyptic number.

51530203515 is a deficient number, since it is larger than the sum of its proper divisors (42696454533).

51530203515 is a wasteful number, since it uses less digits than its factorization.

51530203515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490763858.

The product of its (nonzero) digits is 11250, while the sum is 30.

The spelling of 51530203515 in words is "fifty-one billion, five hundred thirty million, two hundred three thousand, five hundred fifteen".