554455621 has 2 divisors, whose sum is σ = 554455622. Its totient is φ = 554455620.

The previous prime is 554455609. The next prime is 554455633. The reversal of 554455621 is 126554455.

It is a balanced prime because it is at equal distance from previous prime (554455609) and next prime (554455633).

It can be written as a sum of positive squares in only one way, i.e., 551733121 + 2722500 = 23489^2 + 1650^2 .

It is a cyclic number.

It is not a de Polignac number, because 554455621 - 2¹⁷ = 554324549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (554455021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277227810 + 277227811.

It is an arithmetic number, because the mean of its divisors is an integer number (277227811).

Almost surely, 2^554455621 is an apocalyptic number.

It is an amenable number.

554455621 is a deficient number, since it is larger than the sum of its proper divisors (1).

554455621 is an equidigital number, since it uses as much as digits as its factorization.

554455621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120000, while the sum is 37.

The square root of 554455621 is about 23546.8813433966. The cubic root of 554455621 is about 821.5277986214.

The spelling of 554455621 in words is "five hundred fifty-four million, four hundred fifty-five thousand, six hundred twenty-one".