5151202321 has 4 divisors (see below), whose sum is σ = 5276841444. Its totient is φ = 5025563200.

The previous prime is 5151202289. The next prime is 5151202349. The reversal of 5151202321 is 1232021515.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1232021515 = 5 ⋅246404303.

It can be written as a sum of positive squares in 2 ways, for example, as 312052225 + 4839150096 = 17665^2 + 69564^2 .

It is a cyclic number.

It is not a de Polignac number, because 5151202321 - 2⁵ = 5151202289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5151202292 and 5151202301.

It is not an unprimeable number, because it can be changed into a prime (5151202391) 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, 62819500 + ... + 62819581.

It is an arithmetic number, because the mean of its divisors is an integer number (1319210361).

Almost surely, 2^5151202321 is an apocalyptic number.

It is an amenable number.

5151202321 is a deficient number, since it is larger than the sum of its proper divisors (125639123).

5151202321 is a wasteful number, since it uses less digits than its factorization.

5151202321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125639122.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 5151202321 is about 71771.8769505159. The cubic root of 5151202321 is about 1727.0418804436.

Adding to 5151202321 its reverse (1232021515), we get a palindrome (6383223836).

The spelling of 5151202321 in words is "five billion, one hundred fifty-one million, two hundred two thousand, three hundred twenty-one".