552156221 has 4 divisors (see below), whose sum is σ = 569967744. Its totient is φ = 534344700.

The previous prime is 552156197. The next prime is 552156257. The reversal of 552156221 is 122651255.

552156221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 552156221 - 2¹⁴ = 552139837 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 (552156721) 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, 8905715 + ... + 8905776.

It is an arithmetic number, because the mean of its divisors is an integer number (142491936).

Almost surely, 2^552156221 is an apocalyptic number.

It is an amenable number.

552156221 is a deficient number, since it is larger than the sum of its proper divisors (17811523).

552156221 is a wasteful number, since it uses less digits than its factorization.

552156221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17811522.

The product of its digits is 6000, while the sum is 29.

The square root of 552156221 is about 23498.0046174138. The cubic root of 552156221 is about 820.3905639954.

The spelling of 552156221 in words is "five hundred fifty-two million, one hundred fifty-six thousand, two hundred twenty-one".