4354145221 has 4 divisors (see below), whose sum is σ = 4358419200. Its totient is φ = 4349871244.

The previous prime is 4354145177. The next prime is 4354145227. The reversal of 4354145221 is 1225414534.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4354145221 - 2²¹ = 4352048069 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 (4354145227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2135461 + ... + 2137498.

It is an arithmetic number, because the mean of its divisors is an integer number (1089604800).

Almost surely, 2^4354145221 is an apocalyptic number.

It is an amenable number.

4354145221 is a deficient number, since it is larger than the sum of its proper divisors (4273979).

4354145221 is a wasteful number, since it uses less digits than its factorization.

4354145221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4273978.

The product of its digits is 19200, while the sum is 31.

The square root of 4354145221 is about 65985.9471478587. The cubic root of 4354145221 is about 1632.9302581056.

Adding to 4354145221 its reverse (1225414534), we get a palindrome (5579559755).

The spelling of 4354145221 in words is "four billion, three hundred fifty-four million, one hundred forty-five thousand, two hundred twenty-one".