5121551515 has 4 divisors (see below), whose sum is σ = 6145861824. Its totient is φ = 4097241208.

The previous prime is 5121551497. The next prime is 5121551551. The reversal of 5121551515 is 5151551215.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5151551215 = 5 ⋅1030310243.

It is a cyclic number.

It is not a de Polignac number, because 5121551515 - 2¹⁹ = 5121027227 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 512155147 + ... + 512155156.

It is an arithmetic number, because the mean of its divisors is an integer number (1536465456).

Almost surely, 2^5121551515 is an apocalyptic number.

5121551515 is a deficient number, since it is larger than the sum of its proper divisors (1024310309).

5121551515 is a wasteful number, since it uses less digits than its factorization.

5121551515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024310308.

The product of its digits is 6250, while the sum is 31.

The square root of 5121551515 is about 71565.0159994393. The cubic root of 5121551515 is about 1723.7218301586.

The spelling of 5121551515 in words is "five billion, one hundred twenty-one million, five hundred fifty-one thousand, five hundred fifteen".