554402021 has 2 divisors, whose sum is σ = 554402022. Its totient is φ = 554402020.

The previous prime is 554402003. The next prime is 554402039. The reversal of 554402021 is 120204455.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (554402003) and next prime (554402039).

It can be written as a sum of positive squares in only one way, i.e., 450076225 + 104325796 = 21215^2 + 10214^2 .

It is a cyclic number.

It is not a de Polignac number, because 554402021 - 2¹⁰ = 554400997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (554402071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277201010 + 277201011.

It is an arithmetic number, because the mean of its divisors is an integer number (277201011).

Almost surely, 2^554402021 is an apocalyptic number.

It is an amenable number.

554402021 is a deficient number, since it is larger than the sum of its proper divisors (1).

554402021 is an equidigital number, since it uses as much as digits as its factorization.

554402021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 554402021 is about 23545.7431609198. The cubic root of 554402021 is about 821.5013250214.

Adding to 554402021 its reverse (120204455), we get a palindrome (674606476).

The spelling of 554402021 in words is "five hundred fifty-four million, four hundred two thousand, twenty-one".