554551421 has 2 divisors, whose sum is σ = 554551422. Its totient is φ = 554551420.

The previous prime is 554551331. The next prime is 554551433. The reversal of 554551421 is 124155455.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 374616025 + 179935396 = 19355^2 + 13414^2 .

It is a cyclic number.

It is not a de Polignac number, because 554551421 - 2²² = 550357117 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (554551451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277275710 + 277275711.

It is an arithmetic number, because the mean of its divisors is an integer number (277275711).

Almost surely, 2^554551421 is an apocalyptic number.

It is an amenable number.

554551421 is a deficient number, since it is larger than the sum of its proper divisors (1).

554551421 is an equidigital number, since it uses as much as digits as its factorization.

554551421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20000, while the sum is 32.

The square root of 554551421 is about 23548.9154951985. The cubic root of 554551421 is about 821.5751109928.

The spelling of 554551421 in words is "five hundred fifty-four million, five hundred fifty-one thousand, four hundred twenty-one".