51502020515 has 16 divisors (see below), whose sum is σ = 67797492480. Its totient is φ = 37246756320.

The previous prime is 51502020467. The next prime is 51502020529.

51502020515 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-51502020515 is a prime.

It is a super-3 number, since 3×51502020515³ (a number of 33 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2605799 + ... + 2625488.

It is an arithmetic number, because the mean of its divisors is an integer number (4237343280).

Almost surely, 2^51502020515 is an apocalyptic number.

51502020515 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51502020515 is a deficient number, since it is larger than the sum of its proper divisors (16295471965).

51502020515 is a wasteful number, since it uses less digits than its factorization.

51502020515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5231482.

The product of its (nonzero) digits is 2500, while the sum is 26.

It can be divided in two parts, 515020 and 20515, that added together give a palindrome (535535).

The spelling of 51502020515 in words is "fifty-one billion, five hundred two million, twenty thousand, five hundred fifteen".