4154552021 has 4 divisors (see below), whose sum is σ = 4398937452. Its totient is φ = 3910166592.

The previous prime is 4154552009. The next prime is 4154552029. The reversal of 4154552021 is 1202554514.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1703212900 + 2451339121 = 41270^2 + 49511^2 .

It is a cyclic number.

It is not a de Polignac number, because 4154552021 - 2¹⁰ = 4154550997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4154552029) 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, 122192690 + ... + 122192723.

It is an arithmetic number, because the mean of its divisors is an integer number (1099734363).

Almost surely, 2^4154552021 is an apocalyptic number.

It is an amenable number.

4154552021 is a deficient number, since it is larger than the sum of its proper divisors (244385431).

4154552021 is a wasteful number, since it uses less digits than its factorization.

4154552021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244385430.

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

The square root of 4154552021 is about 64455.8144855838. The cubic root of 4154552021 is about 1607.5879188611.

The spelling of 4154552021 in words is "four billion, one hundred fifty-four million, five hundred fifty-two thousand, twenty-one".