51515001115 has 8 divisors (see below), whose sum is σ = 62831411568. Its totient is φ = 40536394080.

The previous prime is 51515001103. The next prime is 51515001119. The reversal of 51515001115 is 51110051515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-51515001115 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51515001115.

It is not an unprimeable number, because it can be changed into a prime (51515001119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84450517 + ... + 84451126.

It is an arithmetic number, because the mean of its divisors is an integer number (7853926446).

Almost surely, 2^51515001115 is an apocalyptic number.

51515001115 is a deficient number, since it is larger than the sum of its proper divisors (11316410453).

51515001115 is a wasteful number, since it uses less digits than its factorization.

51515001115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168901709.

The product of its (nonzero) digits is 625, while the sum is 25.

The spelling of 51515001115 in words is "fifty-one billion, five hundred fifteen million, one thousand, one hundred fifteen".