1552205221 has 16 divisors (see below), whose sum is σ = 1813708800. Its totient is φ = 1300705200.

The previous prime is 1552205203. The next prime is 1552205267. The reversal of 1552205221 is 1225022551.

It is a cyclic number.

It is not a de Polignac number, because 1552205221 - 2⁵ = 1552205189 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 (1552205521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 376630 + ... + 380728.

It is an arithmetic number, because the mean of its divisors is an integer number (113356800).

Almost surely, 2^1552205221 is an apocalyptic number.

It is an amenable number.

1552205221 is a deficient number, since it is larger than the sum of its proper divisors (261503579).

1552205221 is a wasteful number, since it uses less digits than its factorization.

1552205221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5304.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1552205221 is about 39398.0357505295. The cubic root of 1552205221 is about 1157.8431037886.

Adding to 1552205221 its reverse (1225022551), we get a palindrome (2777227772).

The spelling of 1552205221 in words is "one billion, five hundred fifty-two million, two hundred five thousand, two hundred twenty-one".