23405142515513 has 4 divisors (see below), whose sum is σ = 25532882744208. Its totient is φ = 21277402286820.

The previous prime is 23405142515483. The next prime is 23405142515551. The reversal of 23405142515513 is 31551524150432.

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 23405142515513 - 2²⁴ = 23405125738297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23405142515593) 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, 1063870114331 + ... + 1063870114352.

It is an arithmetic number, because the mean of its divisors is an integer number (6383220686052).

Almost surely, 2^{23405142515513} is an apocalyptic number.

It is an amenable number.

23405142515513 is a deficient number, since it is larger than the sum of its proper divisors (2127740228695).

23405142515513 is a wasteful number, since it uses less digits than its factorization.

23405142515513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2127740228694.

The product of its (nonzero) digits is 360000, while the sum is 41.

Adding to 23405142515513 its reverse (31551524150432), we get a palindrome (54956666665945).

The spelling of 23405142515513 in words is "twenty-three trillion, four hundred five billion, one hundred forty-two million, five hundred fifteen thousand, five hundred thirteen".