13235647951 has 4 divisors (see below), whose sum is σ = 13245623392. Its totient is φ = 13225672512.

The previous prime is 13235647949. The next prime is 13235647973. The reversal of 13235647951 is 15974653231.

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 13235647951 - 2¹ = 13235647949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13235647351) 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, 4985730 + ... + 4988383.

It is an arithmetic number, because the mean of its divisors is an integer number (3311405848).

Almost surely, 2^13235647951 is an apocalyptic number.

13235647951 is a deficient number, since it is larger than the sum of its proper divisors (9975441).

13235647951 is an equidigital number, since it uses as much as digits as its factorization.

13235647951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9975440.

The product of its digits is 680400, while the sum is 46.

The spelling of 13235647951 in words is "thirteen billion, two hundred thirty-five million, six hundred forty-seven thousand, nine hundred fifty-one".