1231332553 has 8 divisors (see below), whose sum is σ = 1345521600. Its totient is φ = 1117518480.

The previous prime is 1231332551. The next prime is 1231332581. The reversal of 1231332553 is 3552331321.

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

It is a cyclic number.

It is not a de Polignac number, because 1231332553 - 2¹ = 1231332551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231332551) 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, 86850 + ... + 100027.

It is an arithmetic number, because the mean of its divisors is an integer number (168190200).

Almost surely, 2^1231332553 is an apocalyptic number.

It is an amenable number.

1231332553 is a deficient number, since it is larger than the sum of its proper divisors (114189047).

1231332553 is a wasteful number, since it uses less digits than its factorization.

1231332553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187487.

The product of its digits is 8100, while the sum is 28.

The square root of 1231332553 is about 35090.3484308720. The cubic root of 1231332553 is about 1071.8280547831.

Adding to 1231332553 its reverse (3552331321), we get a palindrome (4783663874).

The spelling of 1231332553 in words is "one billion, two hundred thirty-one million, three hundred thirty-two thousand, five hundred fifty-three".