5161721151 has 4 divisors (see below), whose sum is σ = 6882294872. Its totient is φ = 3441147432.

The previous prime is 5161721137. The next prime is 5161721153. The reversal of 5161721151 is 1511271615.

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

It is not a de Polignac number, because 5161721151 - 2⁹ = 5161720639 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 (5161721153) 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, 860286856 + ... + 860286861.

It is an arithmetic number, because the mean of its divisors is an integer number (1720573718).

Almost surely, 2^5161721151 is an apocalyptic number.

5161721151 is a deficient number, since it is larger than the sum of its proper divisors (1720573721).

5161721151 is a wasteful number, since it uses less digits than its factorization.

5161721151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1720573720.

The product of its digits is 2100, while the sum is 30.

The square root of 5161721151 is about 71845.1191870401. The cubic root of 5161721151 is about 1728.2166293940.

Adding to 5161721151 its reverse (1511271615), we get a palindrome (6672992766).

The spelling of 5161721151 in words is "five billion, one hundred sixty-one million, seven hundred twenty-one thousand, one hundred fifty-one".