51002043515 has 4 divisors (see below), whose sum is σ = 61202452224. Its totient is φ = 40801634808.

The previous prime is 51002043509. The next prime is 51002043517. The reversal of 51002043515 is 51534020015.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51002043515 - 2¹⁸ = 51001781371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51002043517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5100204347 + ... + 5100204356.

It is an arithmetic number, because the mean of its divisors is an integer number (15300613056).

Almost surely, 2^51002043515 is an apocalyptic number.

51002043515 is a deficient number, since it is larger than the sum of its proper divisors (10200408709).

51002043515 is a wasteful number, since it uses less digits than its factorization.

51002043515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10200408708.

The product of its (nonzero) digits is 3000, while the sum is 26.

The spelling of 51002043515 in words is "fifty-one billion, two million, forty-three thousand, five hundred fifteen".