554455021 has 2 divisors, whose sum is σ = 554455022. Its totient is φ = 554455020.

The previous prime is 554455019. The next prime is 554455049. The reversal of 554455021 is 120554455.

554455021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 334377796 + 220077225 = 18286^2 + 14835^2 .

It is a cyclic number.

It is not a de Polignac number, because 554455021 - 2¹ = 554455019 is a prime.

It is a super-2 number, since 2×554455021² = 614840740624220882, which contains 22 as substring.

Together with 554455019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (554455621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277227510 + 277227511.

It is an arithmetic number, because the mean of its divisors is an integer number (277227511).

Almost surely, 2^554455021 is an apocalyptic number.

It is an amenable number.

554455021 is a deficient number, since it is larger than the sum of its proper divisors (1).

554455021 is an equidigital number, since it uses as much as digits as its factorization.

554455021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20000, while the sum is 31.

The square root of 554455021 is about 23546.8686028525. The cubic root of 554455021 is about 821.5275022845.

The spelling of 554455021 in words is "five hundred fifty-four million, four hundred fifty-five thousand, twenty-one".