1532453221 has 16 divisors (see below), whose sum is σ = 1695443904. Its totient is φ = 1376169984.

The previous prime is 1532453201. The next prime is 1532453233. The reversal of 1532453221 is 1223542351.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1532453221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1532453221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1532453201) 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 15 ways as a sum of consecutive naturals, for example, 138330 + ... + 148996.

It is an arithmetic number, because the mean of its divisors is an integer number (105965244).

Almost surely, 2^1532453221 is an apocalyptic number.

It is an amenable number.

1532453221 is a deficient number, since it is larger than the sum of its proper divisors (162990683).

1532453221 is a wasteful number, since it uses less digits than its factorization.

1532453221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10980.

The product of its digits is 7200, while the sum is 28.

The square root of 1532453221 is about 39146.5607812487. The cubic root of 1532453221 is about 1152.9108918663.

Adding to 1532453221 its reverse (1223542351), we get a palindrome (2755995572).

The spelling of 1532453221 in words is "one billion, five hundred thirty-two million, four hundred fifty-three thousand, two hundred twenty-one".