13205250231 has 4 divisors (see below), whose sum is σ = 17607000312. Its totient is φ = 8803500152.

The previous prime is 13205250221. The next prime is 13205250269.

It is a happy number.

13205250231 is nontrivially palindromic in base 10.

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 13205250231 - 2¹⁰ = 13205249207 is a prime.

It is a super-2 number, since 2×13205250231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13205250221) 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, 2200875036 + ... + 2200875041.

It is an arithmetic number, because the mean of its divisors is an integer number (4401750078).

Almost surely, 2^13205250231 is an apocalyptic number.

13205250231 is a deficient number, since it is larger than the sum of its proper divisors (4401750081).

13205250231 is an equidigital number, since it uses as much as digits as its factorization.

13205250231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4401750080.

The product of its (nonzero) digits is 1800, while the sum is 24.

The spelling of 13205250231 in words is "thirteen billion, two hundred five million, two hundred fifty thousand, two hundred thirty-one".