5106505021 has 4 divisors (see below), whose sum is σ = 5215154112. Its totient is φ = 4997855932.

The previous prime is 5106505009. The next prime is 5106505043. The reversal of 5106505021 is 1205056015.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1205056015 = 5 ⋅241011203.

It is a cyclic number.

It is not a de Polignac number, because 5106505021 - 2⁵ = 5106504989 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 (5106505081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54324475 + ... + 54324568.

It is an arithmetic number, because the mean of its divisors is an integer number (1303788528).

Almost surely, 2^5106505021 is an apocalyptic number.

It is an amenable number.

5106505021 is a deficient number, since it is larger than the sum of its proper divisors (108649091).

5106505021 is a wasteful number, since it uses less digits than its factorization.

5106505021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108649090.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 5106505021 is about 71459.8140285853. The cubic root of 5106505021 is about 1722.0321461802.

The spelling of 5106505021 in words is "five billion, one hundred six million, five hundred five thousand, twenty-one".