4421522251 has 4 divisors (see below), whose sum is σ = 4421867112. Its totient is φ = 4421177392.

The previous prime is 4421522249. The next prime is 4421522269. The reversal of 4421522251 is 1522251244.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 4421522251 - 2¹ = 4421522249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4421522951) 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, 152425 + ... + 179098.

It is an arithmetic number, because the mean of its divisors is an integer number (1105466778).

Almost surely, 2^4421522251 is an apocalyptic number.

4421522251 is a deficient number, since it is larger than the sum of its proper divisors (344861).

4421522251 is a wasteful number, since it uses less digits than its factorization.

4421522251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344860.

The product of its digits is 6400, while the sum is 28.

The square root of 4421522251 is about 66494.5279778720. The cubic root of 4421522251 is about 1641.3099600999.

Adding to 4421522251 its reverse (1522251244), we get a palindrome (5943773495).

It can be divided in two parts, 44215 and 22251, that added together give a palindrome (66466).

The spelling of 4421522251 in words is "four billion, four hundred twenty-one million, five hundred twenty-two thousand, two hundred fifty-one".