554430021 has 16 divisors (see below), whose sum is σ = 755136000. Its totient is φ = 361728368.

The previous prime is 554430017. The next prime is 554430047. The reversal of 554430021 is 120034455.

It is a cyclic number.

It is not a de Polignac number, because 554430021 - 2² = 554430017 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 554429973 and 554430000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (554430011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33280 + ... + 47078.

It is an arithmetic number, because the mean of its divisors is an integer number (47196000).

Almost surely, 2^554430021 is an apocalyptic number.

It is an amenable number.

554430021 is a deficient number, since it is larger than the sum of its proper divisors (200705979).

554430021 is a wasteful number, since it uses less digits than its factorization.

554430021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14088.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 554430021 is about 23546.3377407188. The cubic root of 554430021 is about 821.5151547268.

Adding to 554430021 its reverse (120034455), we get a palindrome (674464476).

The spelling of 554430021 in words is "five hundred fifty-four million, four hundred thirty thousand, twenty-one".