51000201515 has 4 divisors (see below), whose sum is σ = 61200241824. Its totient is φ = 40800161208.

The previous prime is 51000201401. The next prime is 51000201517. The reversal of 51000201515 is 51510200015.

It is a happy number.

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 51000201515 - 2¹² = 51000197419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51000201517) 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, 5100020147 + ... + 5100020156.

It is an arithmetic number, because the mean of its divisors is an integer number (15300060456).

Almost surely, 2^51000201515 is an apocalyptic number.

51000201515 is a deficient number, since it is larger than the sum of its proper divisors (10200040309).

51000201515 is a wasteful number, since it uses less digits than its factorization.

51000201515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10200040308.

The product of its (nonzero) digits is 250, while the sum is 20.

The spelling of 51000201515 in words is "fifty-one billion, two hundred one thousand, five hundred fifteen".