1323002145543 has 16 divisors (see below), whose sum is σ = 1930837939296. Its totient is φ = 800808359040.

The previous prime is 1323002145541. The next prime is 1323002145613. The reversal of 1323002145543 is 3455412003231.

It is not a de Polignac number, because 1323002145543 - 2¹ = 1323002145541 is a prime.

It is a super-2 number, since 2×1323002145543² (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 (1323002145541) 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, 278056080 + ... + 278060837.

It is an arithmetic number, because the mean of its divisors is an integer number (120677371206).

Almost surely, 2^{1323002145543} is an apocalyptic number.

1323002145543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1323002145543 is a deficient number, since it is larger than the sum of its proper divisors (607835793753).

1323002145543 is a wasteful number, since it uses less digits than its factorization.

1323002145543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556116994.

The product of its (nonzero) digits is 43200, while the sum is 33.

Adding to 1323002145543 its reverse (3455412003231), we get a palindrome (4778414148774).

The spelling of 1323002145543 in words is "one trillion, three hundred twenty-three billion, two million, one hundred forty-five thousand, five hundred forty-three".