5155050221 has 4 divisors (see below), whose sum is σ = 5155237500. Its totient is φ = 5154862944.

The previous prime is 5155050181. The next prime is 5155050293. The reversal of 5155050221 is 1220505515.

5155050221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1220505515 = 5 ⋅244101103.

It can be written as a sum of positive squares in 2 ways, for example, as 2298147721 + 2856902500 = 47939^2 + 53450^2 .

It is a cyclic number.

It is not a de Polignac number, because 5155050221 - 2¹⁰ = 5155049197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5155058221) 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, 43346 + ... + 110403.

It is an arithmetic number, because the mean of its divisors is an integer number (1288809375).

Almost surely, 2^5155050221 is an apocalyptic number.

It is an amenable number.

5155050221 is a deficient number, since it is larger than the sum of its proper divisors (187279).

5155050221 is a wasteful number, since it uses less digits than its factorization.

5155050221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187278.

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 5155050221 is about 71798.6784070570. The cubic root of 5155050221 is about 1727.4718014613.

Adding to 5155050221 its reverse (1220505515), we get a palindrome (6375555736).

The spelling of 5155050221 in words is "five billion, one hundred fifty-five million, fifty thousand, two hundred twenty-one".