554051021 has 2 divisors, whose sum is σ = 554051022. Its totient is φ = 554051020.

The previous prime is 554050969. The next prime is 554051023. The reversal of 554051021 is 120150455.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 385336900 + 168714121 = 19630^2 + 12989^2 .

It is a cyclic number.

It is not a de Polignac number, because 554051021 - 2¹⁰ = 554049997 is a prime.

It is a super-2 number, since 2×554051021² = 613945067742284882, which contains 22 as substring.

Together with 554051023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (554051023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277025510 + 277025511.

It is an arithmetic number, because the mean of its divisors is an integer number (277025511).

Almost surely, 2^554051021 is an apocalyptic number.

It is an amenable number.

554051021 is a deficient number, since it is larger than the sum of its proper divisors (1).

554051021 is an equidigital number, since it uses as much as digits as its factorization.

554051021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 554051021 is about 23538.2884042150. The cubic root of 554051021 is about 821.3279202670.

The spelling of 554051021 in words is "five hundred fifty-four million, fifty-one thousand, twenty-one".