23431401441521 has 4 divisors (see below), whose sum is σ = 23571709234752. Its totient is φ = 23291093648292.

The previous prime is 23431401441509. The next prime is 23431401441557. The reversal of 23431401441521 is 12514410413432.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23431401441521 - 2⁶ = 23431401441457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23431401741521) 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, 70153896365 + ... + 70153896698.

It is an arithmetic number, because the mean of its divisors is an integer number (5892927308688).

Almost surely, 2^{23431401441521} is an apocalyptic number.

It is an amenable number.

23431401441521 is a deficient number, since it is larger than the sum of its proper divisors (140307793231).

23431401441521 is a wasteful number, since it uses less digits than its factorization.

23431401441521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140307793230.

The product of its (nonzero) digits is 46080, while the sum is 35.

Adding to 23431401441521 its reverse (12514410413432), we get a palindrome (35945811854953).

The spelling of 23431401441521 in words is "twenty-three trillion, four hundred thirty-one billion, four hundred one million, four hundred forty-one thousand, five hundred twenty-one".