515000001 has 4 divisors (see below), whose sum is σ = 686666672. Its totient is φ = 343333332.

The previous prime is 514999847. The next prime is 515000011. The reversal of 515000001 is 100000515.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 515000001 - 2⁹ = 514999489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (515000011) 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, 85833331 + ... + 85833336.

It is an arithmetic number, because the mean of its divisors is an integer number (171666668).

Almost surely, 2^515000001 is an apocalyptic number.

It is an amenable number.

515000001 is a deficient number, since it is larger than the sum of its proper divisors (171666671).

515000001 is a wasteful number, since it uses less digits than its factorization.

515000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171666670.

The product of its (nonzero) digits is 25, while the sum is 12.

The square root of 515000001 is about 22693.6114578531. The cubic root of 515000001 is about 801.5594586565.

Adding to 515000001 its reverse (100000515), we get a palindrome (615000516).

The spelling of 515000001 in words is "five hundred fifteen million, one", and thus it is an aban number.