552641721 has 8 divisors (see below), whose sum is σ = 737231520. Its totient is φ = 368239872.

The previous prime is 552641717. The next prime is 552641773. The reversal of 552641721 is 127146255.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 552641721 - 2² = 552641717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (552641711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39976 + ... + 51993.

It is an arithmetic number, because the mean of its divisors is an integer number (92153940).

Almost surely, 2^552641721 is an apocalyptic number.

It is an amenable number.

552641721 is a deficient number, since it is larger than the sum of its proper divisors (184589799).

552641721 is a wasteful number, since it uses less digits than its factorization.

552641721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93975.

The product of its digits is 16800, while the sum is 33.

The square root of 552641721 is about 23508.3330119343. Note that the first 3 decimals coincide. The cubic root of 552641721 is about 820.6309445988.

Adding to 552641721 its reverse (127146255), we get a palindrome (679787976).

The spelling of 552641721 in words is "five hundred fifty-two million, six hundred forty-one thousand, seven hundred twenty-one".