1023231331543 has 4 divisors (see below), whose sum is σ = 1024195735368. Its totient is φ = 1022266927720.

The previous prime is 1023231331519. The next prime is 1023231331553. The reversal of 1023231331543 is 3451331323201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1023231331543 - 2²⁹ = 1022694460631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023231331513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 482200321 + ... + 482202442.

It is an arithmetic number, because the mean of its divisors is an integer number (256048933842).

Almost surely, 2^{1023231331543} is an apocalyptic number.

1023231331543 is a deficient number, since it is larger than the sum of its proper divisors (964403825).

1023231331543 is an equidigital number, since it uses as much as digits as its factorization.

1023231331543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964403824.

The product of its (nonzero) digits is 19440, while the sum is 31.

Adding to 1023231331543 its reverse (3451331323201), we get a palindrome (4474562654744).

The spelling of 1023231331543 in words is "one trillion, twenty-three billion, two hundred thirty-one million, three hundred thirty-one thousand, five hundred forty-three".