13731742257 has 4 divisors (see below), whose sum is σ = 18308989680. Its totient is φ = 9154494836.

The previous prime is 13731742243. The next prime is 13731742267. The reversal of 13731742257 is 75224713731.

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 13731742257 - 2²⁰ = 13730693681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13731742207) 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, 2288623707 + ... + 2288623712.

It is an arithmetic number, because the mean of its divisors is an integer number (4577247420).

Almost surely, 2^13731742257 is an apocalyptic number.

It is an amenable number.

13731742257 is a deficient number, since it is larger than the sum of its proper divisors (4577247423).

13731742257 is an equidigital number, since it uses as much as digits as its factorization.

13731742257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4577247422.

The product of its digits is 246960, while the sum is 42.

The spelling of 13731742257 in words is "thirteen billion, seven hundred thirty-one million, seven hundred forty-two thousand, two hundred fifty-seven".