2420646251 has 2 divisors, whose sum is σ = 2420646252. Its totient is φ = 2420646250.

The previous prime is 2420646223. The next prime is 2420646271. The reversal of 2420646251 is 1526460242.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2420646251 is a prime.

It is not a weakly prime, because it can be changed into another prime (2420646271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1210323125 + 1210323126.

It is an arithmetic number, because the mean of its divisors is an integer number (1210323126).

Almost surely, 2^2420646251 is an apocalyptic number.

2420646251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2420646251 is an equidigital number, since it uses as much as digits as its factorization.

2420646251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 2420646251 is about 49200.0635263818. The cubic root of 2420646251 is about 1342.6941879550.

The spelling of 2420646251 in words is "two billion, four hundred twenty million, six hundred forty-six thousand, two hundred fifty-one".