5111152721 has 4 divisors (see below), whose sum is σ = 5117905332. Its totient is φ = 5104400112.

The previous prime is 5111152693. The next prime is 5111152733. The reversal of 5111152721 is 1272511115.

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 2140357696 + 2970795025 = 46264^2 + 54505^2 .

It is a cyclic number.

It is not a de Polignac number, because 5111152721 - 2¹⁰ = 5111151697 is a prime.

It is a super-2 number, since 2×5111152721² = 52247764274771407682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5111152021) 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, 3375170 + ... + 3376683.

It is an arithmetic number, because the mean of its divisors is an integer number (1279476333).

Almost surely, 2^5111152721 is an apocalyptic number.

It is an amenable number.

5111152721 is a deficient number, since it is larger than the sum of its proper divisors (6752611).

5111152721 is an equidigital number, since it uses as much as digits as its factorization.

5111152721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6752610.

The product of its digits is 700, while the sum is 26.

The square root of 5111152721 is about 71492.3263084927. The cubic root of 5111152721 is about 1722.5544252385.

Adding to 5111152721 its reverse (1272511115), we get a palindrome (6383663836).

The spelling of 5111152721 in words is "five billion, one hundred eleven million, one hundred fifty-two thousand, seven hundred twenty-one".