4551552121 has 4 divisors (see below), whose sum is σ = 4551692112. Its totient is φ = 4551412132.

The previous prime is 4551552119. The next prime is 4551552139. The reversal of 4551552121 is 1212551554.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 4551552121 - 2¹ = 4551552119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4551552191) 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, 7026 + ... + 95668.

It is an arithmetic number, because the mean of its divisors is an integer number (1137923028).

Almost surely, 2^4551552121 is an apocalyptic number.

It is an amenable number.

4551552121 is a deficient number, since it is larger than the sum of its proper divisors (139991).

4551552121 is an equidigital number, since it uses as much as digits as its factorization.

4551552121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139990.

The product of its digits is 10000, while the sum is 31.

The square root of 4551552121 is about 67465.1919214642. The cubic root of 4551552121 is about 1657.2441962484.

The spelling of 4551552121 in words is "four billion, five hundred fifty-one million, five hundred fifty-two thousand, one hundred twenty-one".