7243745133257 has 4 divisors (see below), whose sum is σ = 7477414331136. Its totient is φ = 7010075935380.

The previous prime is 7243745133217. The next prime is 7243745133299. The reversal of 7243745133257 is 7523315473427.

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 7243745133257 - 2¹⁰ = 7243745132233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7243745133199 and 7243745133208.

It is not an unprimeable number, because it can be changed into a prime (7243745133217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116834598893 + ... + 116834598954.

It is an arithmetic number, because the mean of its divisors is an integer number (1869353582784).

Almost surely, 2^{7243745133257} is an apocalyptic number.

It is an amenable number.

7243745133257 is a deficient number, since it is larger than the sum of its proper divisors (233669197879).

7243745133257 is a wasteful number, since it uses less digits than its factorization.

7243745133257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233669197878.

The product of its digits is 14817600, while the sum is 53.

The spelling of 7243745133257 in words is "seven trillion, two hundred forty-three billion, seven hundred forty-five million, one hundred thirty-three thousand, two hundred fifty-seven".