554140021 has 4 divisors (see below), whose sum is σ = 554219200.
Its totient is φ = 554060844.
The previous prime is 554140003. The next prime is 554140031. The reversal of 554140021 is 120041455.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.
It is a cyclic number.
It is not a de Polignac number, because 554140021 - 27 = 554139893 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 554139974 and 554140001.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (554140001) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27951 + ... + 43468.
It is an arithmetic number, because the mean of its divisors is an integer number (138554800).
Almost surely, 2554140021 is an apocalyptic number.
It is an amenable number.
554140021 is a deficient number, since it is larger than the sum of its proper divisors (79179).
554140021 is an equidigital number, since it uses as much as digits as its factorization.
554140021 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 79178.
The product of its (nonzero) digits is 800, while the sum is 22.
The square root of 554140021 is about 23540.1788650809.
The cubic root of 554140021 is about 821.3718959230.
Adding to 554140021 its reverse (120041455), we get a palindrome (674181476).
The spelling of 554140021 in words is "five hundred fifty-four million, one hundred forty thousand, twenty-one".