1555143241 has 16 divisors (see below), whose sum is σ = 1669455360. Its totient is φ = 1445391360.

The previous prime is 1555143223. The next prime is 1555143253. The reversal of 1555143241 is 1423415551.

It is a cyclic number.

It is not a de Polignac number, because 1555143241 - 2⁷ = 1555143113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1555143281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169026 + ... + 177988.

It is an arithmetic number, because the mean of its divisors is an integer number (104340960).

Almost surely, 2^1555143241 is an apocalyptic number.

It is an amenable number.

1555143241 is a deficient number, since it is larger than the sum of its proper divisors (114312119).

1555143241 is a wasteful number, since it uses less digits than its factorization.

1555143241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9216.

The product of its digits is 12000, while the sum is 31.

The square root of 1555143241 is about 39435.3044999021. The cubic root of 1555143241 is about 1158.5731666506.

Adding to 1555143241 its reverse (1423415551), we get a palindrome (2978558792).

The spelling of 1555143241 in words is "one billion, five hundred fifty-five million, one hundred forty-three thousand, two hundred forty-one".