8217557241 has 4 divisors (see below), whose sum is σ = 10956742992. Its totient is φ = 5478371492.

The previous prime is 8217557237. The next prime is 8217557329. The reversal of 8217557241 is 1427557128.

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 8217557241 - 2² = 8217557237 is a prime.

It is a super-2 number, since 2×8217557241² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8217557193 and 8217557202.

It is not an unprimeable number, because it can be changed into a prime (8217557041) 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, 1369592871 + ... + 1369592876.

It is an arithmetic number, because the mean of its divisors is an integer number (2739185748).

Almost surely, 2^8217557241 is an apocalyptic number.

It is an amenable number.

8217557241 is a deficient number, since it is larger than the sum of its proper divisors (2739185751).

8217557241 is a wasteful number, since it uses less digits than its factorization.

8217557241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2739185750.

The product of its digits is 156800, while the sum is 42.

The square root of 8217557241 is about 90650.7431905553. The cubic root of 8217557241 is about 2017.9678646025.

The spelling of 8217557241 in words is "eight billion, two hundred seventeen million, five hundred fifty-seven thousand, two hundred forty-one".