1555224412231 has 6 divisors (see below), whose sum is σ = 1809138602040. Its totient is φ = 1333049496156.

The previous prime is 1555224412223. The next prime is 1555224412267. The reversal of 1555224412231 is 1322144225551.

It is not a de Polignac number, because 1555224412231 - 2³ = 1555224412223 is a prime.

It is a super-2 number, since 2×1555224412231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555224412271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15869636811 + ... + 15869636908.

It is an arithmetic number, because the mean of its divisors is an integer number (301523100340).

Almost surely, 2^{1555224412231} is an apocalyptic number.

1555224412231 is a deficient number, since it is larger than the sum of its proper divisors (253914189809).

1555224412231 is an equidigital number, since it uses as much as digits as its factorization.

1555224412231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31739273733 (or 31739273726 counting only the distinct ones).

The product of its digits is 96000, while the sum is 37.

Adding to 1555224412231 its reverse (1322144225551), we get a palindrome (2877368637782).

It can be divided in two parts, 155522 and 4412231, that added together give a triangular number (4567753 = T₃₀₂₂).

The spelling of 1555224412231 in words is "one trillion, five hundred fifty-five billion, two hundred twenty-four million, four hundred twelve thousand, two hundred thirty-one".