5621111 has 4 divisors (see below), whose sum is σ = 5626224. Its totient is φ = 5616000.

The previous prime is 5621081. The next prime is 5621113. The reversal of 5621111 is 1111265.

5621111 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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 5621111 - 2¹⁴ = 5604727 is a prime.

It is a Duffinian number.

5621111 is a modest number, since divided by 1111 gives 562 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 5621111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5621113) 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, 155 + ... + 3356.

It is an arithmetic number, because the mean of its divisors is an integer number (1406556).

Almost surely, 2^5621111 is an apocalyptic number.

5621111 is a deficient number, since it is larger than the sum of its proper divisors (5113).

5621111 is a wasteful number, since it uses less digits than its factorization.

5621111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5112.

The product of its digits is 60, while the sum is 17.

The square root of 5621111 is about 2370.8882301787. Note that the first 3 decimals coincide. The cubic root of 5621111 is about 177.8036698255.

Adding to 5621111 its reverse (1111265), we get a palindrome (6732376).

The spelling of 5621111 in words is "five million, six hundred twenty-one thousand, one hundred eleven".