4221541545 has 16 divisors (see below), whose sum is σ = 7274041152. Its totient is φ = 2078297280.

The previous prime is 4221541537. The next prime is 4221541567. The reversal of 4221541545 is 5451451224.

It is a happy number.

It is not a de Polignac number, because 4221541545 - 2³ = 4221541537 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10824271 + ... + 10824660.

It is an arithmetic number, because the mean of its divisors is an integer number (454627572).

Almost surely, 2^4221541545 is an apocalyptic number.

It is an amenable number.

4221541545 is a deficient number, since it is larger than the sum of its proper divisors (3052499607).

4221541545 is a wasteful number, since it uses less digits than its factorization.

4221541545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21648952.

The product of its digits is 32000, while the sum is 33.

The square root of 4221541545 is about 64973.3910535690. The cubic root of 4221541545 is about 1616.1823360627.

Adding to 4221541545 its reverse (5451451224), we get a palindrome (9672992769).

The spelling of 4221541545 in words is "four billion, two hundred twenty-one million, five hundred forty-one thousand, five hundred forty-five".