1555243441 has 2 divisors, whose sum is σ = 1555243442. Its totient is φ = 1555243440.

The previous prime is 1555243421. The next prime is 1555243457. The reversal of 1555243441 is 1443425551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1115292816 + 439950625 = 33396^2 + 20975^2 .

It is a cyclic number.

It is not a de Polignac number, because 1555243441 - 2⁵ = 1555243409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1555243397 and 1555243406.

It is not a weakly prime, because it can be changed into another prime (1555243421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777621720 + 777621721.

It is an arithmetic number, because the mean of its divisors is an integer number (777621721).

Almost surely, 2^1555243441 is an apocalyptic number.

It is an amenable number.

1555243441 is a deficient number, since it is larger than the sum of its proper divisors (1).

1555243441 is an equidigital number, since it uses as much as digits as its factorization.

1555243441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48000, while the sum is 34.

The square root of 1555243441 is about 39436.5749146652. The cubic root of 1555243441 is about 1158.5980489326.

Adding to 1555243441 its reverse (1443425551), we get a palindrome (2998668992).

The spelling of 1555243441 in words is "one billion, five hundred fifty-five million, two hundred forty-three thousand, four hundred forty-one".