8641242251 has 2 divisors, whose sum is σ = 8641242252. Its totient is φ = 8641242250.

The previous prime is 8641242229. The next prime is 8641242361. The reversal of 8641242251 is 1522421468.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8641242251 - 2¹⁴ = 8641225867 is a prime.

It is not a weakly prime, because it can be changed into another prime (8631242251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4320621125 + 4320621126.

It is an arithmetic number, because the mean of its divisors is an integer number (4320621126).

Almost surely, 2^8641242251 is an apocalyptic number.

8641242251 is a deficient number, since it is larger than the sum of its proper divisors (1).

8641242251 is an equidigital number, since it uses as much as digits as its factorization.

8641242251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30720, while the sum is 35.

The square root of 8641242251 is about 92958.2823152407. The cubic root of 8641242251 is about 2052.0694747867.

The spelling of 8641242251 in words is "eight billion, six hundred forty-one million, two hundred forty-two thousand, two hundred fifty-one".