23543215541 has 4 divisors (see below), whose sum is σ = 24566833632. Its totient is φ = 22519597452.

The previous prime is 23543215519. The next prime is 23543215543. The reversal of 23543215541 is 14551234532.

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 a de Polignac number, because none of the positive numbers 2^k-23543215541 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 (23543215543) 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, 511809011 + ... + 511809056.

It is an arithmetic number, because the mean of its divisors is an integer number (6141708408).

Almost surely, 2^23543215541 is an apocalyptic number.

It is an amenable number.

23543215541 is a deficient number, since it is larger than the sum of its proper divisors (1023618091).

23543215541 is a wasteful number, since it uses less digits than its factorization.

23543215541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023618090.

The product of its digits is 72000, while the sum is 35.

The spelling of 23543215541 in words is "twenty-three billion, five hundred forty-three million, two hundred fifteen thousand, five hundred forty-one".