10001515001 has 8 divisors (see below), whose sum is σ = 10126022664. Its totient is φ = 9877507200.

The previous prime is 10001514979. The next prime is 10001515061. The reversal of 10001515001 is 10051510001.

It can be written as a sum of positive squares in 4 ways, for example, as 5787557776 + 4213957225 = 76076^2 + 64915^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10001515001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10001515061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84620 + ... + 164813.

It is an arithmetic number, because the mean of its divisors is an integer number (1265752833).

Almost surely, 2^10001515001 is an apocalyptic number.

It is an amenable number.

10001515001 is a deficient number, since it is larger than the sum of its proper divisors (124507663).

10001515001 is a wasteful number, since it uses less digits than its factorization.

10001515001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249931.

The product of its (nonzero) digits is 25, while the sum is 14.

Subtracting 10001515001 from its reverse (10051510001), we obtain a triangular number (49995000 = T₉₉₉₉).

The spelling of 10001515001 in words is "ten billion, one million, five hundred fifteen thousand, one".