13535512231 has 4 divisors (see below), whose sum is σ = 13542292152. Its totient is φ = 13528732312.

The previous prime is 13535512169. The next prime is 13535512247. The reversal of 13535512231 is 13221553531.

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

It is a cyclic number.

It is not a de Polignac number, because 13535512231 - 2²¹ = 13533415079 is a prime.

It is a super-2 number, since 2×13535512231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13535512193 and 13535512202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13535512271) 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, 3386965 + ... + 3390958.

It is an arithmetic number, because the mean of its divisors is an integer number (3385573038).

Almost surely, 2^13535512231 is an apocalyptic number.

13535512231 is a deficient number, since it is larger than the sum of its proper divisors (6779921).

13535512231 is an equidigital number, since it uses as much as digits as its factorization.

13535512231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6779920.

The product of its digits is 13500, while the sum is 31.

The spelling of 13535512231 in words is "thirteen billion, five hundred thirty-five million, five hundred twelve thousand, two hundred thirty-one".