23054515545521 has 4 divisors (see below), whose sum is σ = 23171543543412. Its totient is φ = 22937487547632.

The previous prime is 23054515545511. The next prime is 23054515545527. The reversal of 23054515545521 is 12554551545032.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15455473509025 + 7599042036496 = 3931345^2 + 2756636^2 .

It is a cyclic number.

It is not a de Polignac number, because 23054515545521 - 2¹⁰ = 23054515544497 is a prime.

It is a super-2 number, since 2×23054515545521² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23054515545527) 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, 58513998650 + ... + 58513999043.

It is an arithmetic number, because the mean of its divisors is an integer number (5792885885853).

Almost surely, 2^{23054515545521} is an apocalyptic number.

It is an amenable number.

23054515545521 is a deficient number, since it is larger than the sum of its proper divisors (117027997891).

23054515545521 is a wasteful number, since it uses less digits than its factorization.

23054515545521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117027997890.

The product of its (nonzero) digits is 3000000, while the sum is 47.

The spelling of 23054515545521 in words is "twenty-three trillion, fifty-four billion, five hundred fifteen million, five hundred forty-five thousand, five hundred twenty-one".