554121221 has 8 divisors (see below), whose sum is σ = 583619904. Its totient is φ = 525073120.

The previous prime is 554121203. The next prime is 554121233. The reversal of 554121221 is 122121455.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-554121221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (554121251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110120 + ... + 115041.

It is an arithmetic number, because the mean of its divisors is an integer number (72952488).

Almost surely, 2^554121221 is an apocalyptic number.

It is an amenable number.

554121221 is a deficient number, since it is larger than the sum of its proper divisors (29498683).

554121221 is a wasteful number, since it uses less digits than its factorization.

554121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225291.

The product of its digits is 800, while the sum is 23.

The square root of 554121221 is about 23539.7795444222. The cubic root of 554121221 is about 821.3626070756.

Adding to 554121221 its reverse (122121455), we get a palindrome (676242676).

It can be divided in two parts, 5541 and 21221, that added together give a palindrome (26762).

The spelling of 554121221 in words is "five hundred fifty-four million, one hundred twenty-one thousand, two hundred twenty-one".