5751221 has 4 divisors (see below), whose sum is σ = 6572832. Its totient is φ = 4929612.

The previous prime is 5751217. The next prime is 5751223. The reversal of 5751221 is 1221575.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 5751221 - 2² = 5751217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5751223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 410795 + ... + 410808.

It is an arithmetic number, because the mean of its divisors is an integer number (1643208).

Almost surely, 2^5751221 is an apocalyptic number.

It is an amenable number.

5751221 is a deficient number, since it is larger than the sum of its proper divisors (821611).

5751221 is an equidigital number, since it uses as much as digits as its factorization.

5751221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821610.

The product of its digits is 700, while the sum is 23.

The square root of 5751221 is about 2398.1703442416. The cubic root of 5751221 is about 179.1650735271.

Adding to 5751221 its reverse (1221575), we get a palindrome (6972796).

The spelling of 5751221 in words is "five million, seven hundred fifty-one thousand, two hundred twenty-one".