5161170221 has 4 divisors (see below), whose sum is σ = 5161330944. Its totient is φ = 5161009500.

The previous prime is 5161170211. The next prime is 5161170337. The reversal of 5161170221 is 1220711615.

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: 1220711615 = 5 ⋅244142323.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5161170221 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 (5161170211) 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, 13835 + ... + 102536.

It is an arithmetic number, because the mean of its divisors is an integer number (1290332736).

Almost surely, 2^5161170221 is an apocalyptic number.

It is an amenable number.

5161170221 is a deficient number, since it is larger than the sum of its proper divisors (160723).

5161170221 is a wasteful number, since it uses less digits than its factorization.

5161170221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160722.

The product of its (nonzero) digits is 840, while the sum is 26.

The square root of 5161170221 is about 71841.2849342215. The cubic root of 5161170221 is about 1728.1551408429.

Adding to 5161170221 its reverse (1220711615), we get a palindrome (6381881836).

The spelling of 5161170221 in words is "five billion, one hundred sixty-one million, one hundred seventy thousand, two hundred twenty-one".