5111721 has 16 divisors (see below), whose sum is σ = 7667520. Its totient is φ = 3365280.

The previous prime is 5111719. The next prime is 5111723. The reversal of 5111721 is 1271115.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (5111719) and next prime (5111723).

It is not a de Polignac number, because 5111721 - 2¹ = 5111719 is a prime.

It is a super-2 number, since 2×5111721² = 52259383163682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 5111694 and 5111703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5111723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1101 + ... + 3381.

It is an arithmetic number, because the mean of its divisors is an integer number (479220).

Almost surely, 2^5111721 is an apocalyptic number.

It is an amenable number.

5111721 is a deficient number, since it is larger than the sum of its proper divisors (2555799).

5111721 is a wasteful number, since it uses less digits than its factorization.

5111721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2373 (or 2367 counting only the distinct ones).

The product of its digits is 70, while the sum is 18.

The square root of 5111721 is about 2260.9115418344. The cubic root of 5111721 is about 172.2618263103.

Adding to 5111721 its reverse (1271115), we get a palindrome (6382836).

Subtracting from 5111721 its reverse (1271115), we obtain a triangular number (3840606 = T₂₇₇₁).

It can be divided in two parts, 5111 and 721, that added together give a cube (5832 = 18³).

The spelling of 5111721 in words is "five million, one hundred eleven thousand, seven hundred twenty-one".