2421222451 has 2 divisors, whose sum is σ = 2421222452. Its totient is φ = 2421222450.

The previous prime is 2421222403. The next prime is 2421222473. The reversal of 2421222451 is 1542221242.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2421222451 is a prime.

It is not a weakly prime, because it can be changed into another prime (2421222491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1210611225 + 1210611226.

It is an arithmetic number, because the mean of its divisors is an integer number (1210611226).

Almost surely, 2^2421222451 is an apocalyptic number.

2421222451 is a deficient number, since it is larger than the sum of its proper divisors (1).

2421222451 is an equidigital number, since it uses as much as digits as its factorization.

2421222451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2560, while the sum is 25.

The square root of 2421222451 is about 49205.9188614541. The cubic root of 2421222451 is about 1342.8007158450.

Adding to 2421222451 its reverse (1542221242), we get a palindrome (3963443693).

The spelling of 2421222451 in words is "two billion, four hundred twenty-one million, two hundred twenty-two thousand, four hundred fifty-one".