5120515551 has 32 divisors (see below), whose sum is σ = 7225090048. Its totient is φ = 3220650720.

The previous prime is 5120515537. The next prime is 5120515571. The reversal of 5120515551 is 1555150215.

It is not a de Polignac number, because 5120515551 - 2¹⁸ = 5120253407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5120515501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3146400 + ... + 3148026.

It is an arithmetic number, because the mean of its divisors is an integer number (225784064).

Almost surely, 2^5120515551 is an apocalyptic number.

5120515551 is a deficient number, since it is larger than the sum of its proper divisors (2104574497).

5120515551 is a wasteful number, since it uses less digits than its factorization.

5120515551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2491.

The product of its (nonzero) digits is 6250, while the sum is 30.

The square root of 5120515551 is about 71557.7777114410. Note that the first 4 decimals coincide. The cubic root of 5120515551 is about 1723.6056001338.

Adding to 5120515551 its reverse (1555150215), we get a palindrome (6675665766).

The spelling of 5120515551 in words is "five billion, one hundred twenty million, five hundred fifteen thousand, five hundred fifty-one".