1553230221 has 8 divisors (see below), whose sum is σ = 2179972320. Its totient is φ = 980987472.

The previous prime is 1553230207. The next prime is 1553230241. The reversal of 1553230221 is 1220323551.

It is a happy number.

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

It is not a de Polignac number, because 1553230221 - 2⁹ = 1553229709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1553230191 and 1553230200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1553230241) 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, 13624770 + ... + 13624883.

It is an arithmetic number, because the mean of its divisors is an integer number (272496540).

Almost surely, 2^1553230221 is an apocalyptic number.

It is an amenable number.

1553230221 is a deficient number, since it is larger than the sum of its proper divisors (626742099).

1553230221 is a wasteful number, since it uses less digits than its factorization.

1553230221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27249675.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 1553230221 is about 39411.0418664617. The cubic root of 1553230221 is about 1158.0979085934.

Adding to 1553230221 its reverse (1220323551), we get a palindrome (2773553772).

It can be divided in two parts, 15532 and 30221, that added together give a triangular number (45753 = T₃₀₂).

The spelling of 1553230221 in words is "one billion, five hundred fifty-three million, two hundred thirty thousand, two hundred twenty-one".