7255817243 has 4 divisors (see below), whose sum is σ = 7682630040. Its totient is φ = 6829004448.

The previous prime is 7255817237. The next prime is 7255817267. The reversal of 7255817243 is 3427185527.

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

It is not a de Polignac number, because 7255817243 - 2⁸ = 7255816987 is a prime.

It is a super-2 number, since 2×7255817243² (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 = 7255817194 and 7255817203.

It is not an unprimeable number, because it can be changed into a prime (7255811243) 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, 213406373 + ... + 213406406.

It is an arithmetic number, because the mean of its divisors is an integer number (1920657510).

Almost surely, 2^7255817243 is an apocalyptic number.

7255817243 is a deficient number, since it is larger than the sum of its proper divisors (426812797).

7255817243 is a wasteful number, since it uses less digits than its factorization.

7255817243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426812796.

The product of its digits is 470400, while the sum is 44.

The square root of 7255817243 is about 85181.0850071775. The cubic root of 7255817243 is about 1935.9558331902.

The spelling of 7255817243 in words is "seven billion, two hundred fifty-five million, eight hundred seventeen thousand, two hundred forty-three".