43401231221323 has 16 divisors (see below), whose sum is σ = 46056548678400. Its totient is φ = 40809961081120.

The previous prime is 43401231221311. The next prime is 43401231221357. The reversal of 43401231221323 is 32312213210434.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43401231221323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43401231221123) 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, 104048808 + ... + 104465098.

It is an arithmetic number, because the mean of its divisors is an integer number (2878534292400).

Almost surely, 2^{43401231221323} is an apocalyptic number.

43401231221323 is a deficient number, since it is larger than the sum of its proper divisors (2655317457077).

43401231221323 is a wasteful number, since it uses less digits than its factorization.

43401231221323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493202.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 43401231221323 its reverse (32312213210434), we get a palindrome (75713444431757).

The spelling of 43401231221323 in words is "forty-three trillion, four hundred one billion, two hundred thirty-one million, two hundred twenty-one thousand, three hundred twenty-three".