1206533231 has 16 divisors (see below), whose sum is σ = 1348178400. Its totient is φ = 1073046528.

The previous prime is 1206533221. The next prime is 1206533243. The reversal of 1206533231 is 1323356021.

It is a de Polignac number, because none of the positive numbers 2^k-1206533231 is a prime.

It is a super-2 number, since 2×1206533231² = 2911444875014598722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1206533231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206533221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127541 + ... + 136673.

It is an arithmetic number, because the mean of its divisors is an integer number (84261150).

Almost surely, 2^1206533231 is an apocalyptic number.

1206533231 is a deficient number, since it is larger than the sum of its proper divisors (141645169).

1206533231 is a wasteful number, since it uses less digits than its factorization.

1206533231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9578.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 1206533231 is about 34735.1872169994. The cubic root of 1206533231 is about 1064.5835782249.

Adding to 1206533231 its reverse (1323356021), we get a palindrome (2529889252).

The spelling of 1206533231 in words is "one billion, two hundred six million, five hundred thirty-three thousand, two hundred thirty-one".