4221225551 has 4 divisors (see below), whose sum is σ = 4280679504. Its totient is φ = 4161771600.

The previous prime is 4221225539. The next prime is 4221225563. The reversal of 4221225551 is 1555221224.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (4221225539) and next prime (4221225563).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4221225551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221225251) 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, 29726870 + ... + 29727011.

It is an arithmetic number, because the mean of its divisors is an integer number (1070169876).

Almost surely, 2^4221225551 is an apocalyptic number.

4221225551 is a deficient number, since it is larger than the sum of its proper divisors (59453953).

4221225551 is an equidigital number, since it uses as much as digits as its factorization.

4221225551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59453952.

The product of its digits is 8000, while the sum is 29.

The square root of 4221225551 is about 64970.9592895164. The cubic root of 4221225551 is about 1616.1420098250.

Adding to 4221225551 its reverse (1555221224), we get a palindrome (5776446775).

The spelling of 4221225551 in words is "four billion, two hundred twenty-one million, two hundred twenty-five thousand, five hundred fifty-one".