23531534135 has 4 divisors (see below), whose sum is σ = 28237840968. Its totient is φ = 18825227304.

The previous prime is 23531534129. The next prime is 23531534141. The reversal of 23531534135 is 53143513532.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (23531534129) and next prime (23531534141).

It is a cyclic number.

It is not a de Polignac number, because 23531534135 - 2¹⁰ = 23531533111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23531534095 and 23531534104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2353153409 + ... + 2353153418.

It is an arithmetic number, because the mean of its divisors is an integer number (7059460242).

Almost surely, 2^23531534135 is an apocalyptic number.

23531534135 is a deficient number, since it is larger than the sum of its proper divisors (4706306833).

23531534135 is an equidigital number, since it uses as much as digits as its factorization.

23531534135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4706306832.

The product of its digits is 81000, while the sum is 35.

The spelling of 23531534135 in words is "twenty-three billion, five hundred thirty-one million, five hundred thirty-four thousand, one hundred thirty-five".