1352443221 has 6 divisors (see below), whose sum is σ = 1953529110. Its totient is φ = 901628808.

The previous prime is 1352443219. The next prime is 1352443229. The reversal of 1352443221 is 1223442531.

It can be written as a sum of positive squares in only one way, i.e., 1196468100 + 155975121 = 34590^2 + 12489^2 .

It is not a de Polignac number, because 1352443221 - 2¹ = 1352443219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1352443229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 75135726 + ... + 75135743.

It is an arithmetic number, because the mean of its divisors is an integer number (325588185).

Almost surely, 2^1352443221 is an apocalyptic number.

It is an amenable number.

1352443221 is a deficient number, since it is larger than the sum of its proper divisors (601085889).

1352443221 is a wasteful number, since it uses less digits than its factorization.

1352443221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150271475 (or 150271472 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 1352443221 is about 36775.5791388796. The cubic root of 1352443221 is about 1105.8757813440.

Adding to 1352443221 its reverse (1223442531), we get a palindrome (2575885752).

The spelling of 1352443221 in words is "one billion, three hundred fifty-two million, four hundred forty-three thousand, two hundred twenty-one".