5553721 has 2 divisors, whose sum is σ = 5553722. Its totient is φ = 5553720.

The previous prime is 5553683. The next prime is 5553727. The reversal of 5553721 is 1273555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2958400 + 2595321 = 1720^2 + 1611^2 .

It is a cyclic number.

It is not a de Polignac number, because 5553721 - 2⁷ = 5553593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5553721.

It is not a weakly prime, because it can be changed into another prime (5553727) 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 as a sum of consecutive naturals, namely, 2776860 + 2776861.

It is an arithmetic number, because the mean of its divisors is an integer number (2776861).

Almost surely, 2^5553721 is an apocalyptic number.

It is an amenable number.

5553721 is a deficient number, since it is larger than the sum of its proper divisors (1).

5553721 is an equidigital number, since it uses as much as digits as its factorization.

5553721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5250, while the sum is 28.

The square root of 5553721 is about 2356.6334038199. The cubic root of 5553721 is about 177.0902643223.

The spelling of 5553721 in words is "five million, five hundred fifty-three thousand, seven hundred twenty-one".