1553054221 has 2 divisors, whose sum is σ = 1553054222. Its totient is φ = 1553054220.

The previous prime is 1553054207. The next prime is 1553054233. The reversal of 1553054221 is 1224503551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1541426121 + 11628100 = 39261^2 + 3410^2 .

It is a cyclic number.

It is not a de Polignac number, because 1553054221 - 2¹⁵ = 1553021453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1553054221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1553754221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 776527110 + 776527111.

It is an arithmetic number, because the mean of its divisors is an integer number (776527111).

Almost surely, 2^1553054221 is an apocalyptic number.

It is an amenable number.

1553054221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1553054221 is an equidigital number, since it uses as much as digits as its factorization.

1553054221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 1553054221 is about 39408.8089264317. The cubic root of 1553054221 is about 1158.0541647173.

Adding to 1553054221 its reverse (1224503551), we get a palindrome (2777557772).

It can be divided in two parts, 15530 and 54221, that added together give a triangular number (69751 = T₃₇₃).

The spelling of 1553054221 in words is "one billion, five hundred fifty-three million, fifty-four thousand, two hundred twenty-one".