4245221551 has 2 divisors, whose sum is σ = 4245221552. Its totient is φ = 4245221550.

The previous prime is 4245221503. The next prime is 4245221557. The reversal of 4245221551 is 1551225424.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4245221551 - 2⁹ = 4245221039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4245221557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2122610775 + 2122610776.

It is an arithmetic number, because the mean of its divisors is an integer number (2122610776).

Almost surely, 2^4245221551 is an apocalyptic number.

4245221551 is a deficient number, since it is larger than the sum of its proper divisors (1).

4245221551 is an equidigital number, since it uses as much as digits as its factorization.

4245221551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16000, while the sum is 31.

The square root of 4245221551 is about 65155.3647138898. The cubic root of 4245221551 is about 1619.1986016145.

Adding to 4245221551 its reverse (1551225424), we get a palindrome (5796446975).

The spelling of 4245221551 in words is "four billion, two hundred forty-five million, two hundred twenty-one thousand, five hundred fifty-one".