2543404145321 has 16 divisors (see below), whose sum is σ = 2858221914240. Its totient is φ = 2245616714880.

The previous prime is 2543404145267. The next prime is 2543404145353. The reversal of 2543404145321 is 1235414043452.

It is a cyclic number.

It is not a de Polignac number, because 2543404145321 - 2¹⁰ = 2543404144297 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2543404145521) 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, 12462461 + ... + 12664901.

It is an arithmetic number, because the mean of its divisors is an integer number (178638869640).

Almost surely, 2^{2543404145321} is an apocalyptic number.

It is an amenable number.

2543404145321 is a deficient number, since it is larger than the sum of its proper divisors (314817768919).

2543404145321 is a wasteful number, since it uses less digits than its factorization.

2543404145321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244496.

The product of its (nonzero) digits is 230400, while the sum is 38.

Adding to 2543404145321 its reverse (1235414043452), we get a palindrome (3778818188773).

The spelling of 2543404145321 in words is "two trillion, five hundred forty-three billion, four hundred four million, one hundred forty-five thousand, three hundred twenty-one".