5101505021 has 4 divisors (see below), whose sum is σ = 5102182044. Its totient is φ = 5100828000.

The previous prime is 5101505011. The next prime is 5101505047. The reversal of 5101505021 is 1205051015.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3411144025 + 1690360996 = 58405^2 + 41114^2 .

It is a cyclic number.

It is not a de Polignac number, because 5101505021 - 2¹⁸ = 5101242877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 5101504984 and 5101505002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5101505011) 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, 327080 + ... + 342321.

It is an arithmetic number, because the mean of its divisors is an integer number (1275545511).

Almost surely, 2^5101505021 is an apocalyptic number.

It is an amenable number.

5101505021 is a deficient number, since it is larger than the sum of its proper divisors (677023).

5101505021 is an equidigital number, since it uses as much as digits as its factorization.

5101505021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677022.

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

The square root of 5101505021 is about 71424.8207628133. The cubic root of 5101505021 is about 1721.4699239154.

Adding to 5101505021 its reverse (1205051015), we get a palindrome (6306556036).

The spelling of 5101505021 in words is "five billion, one hundred one million, five hundred five thousand, twenty-one".