1131432213 has 16 divisors (see below), whose sum is σ = 1550340416. Its totient is φ = 733432320.

The previous prime is 1131432193. The next prime is 1131432217. The reversal of 1131432213 is 3122341311.

It is not a de Polignac number, because 1131432213 - 2⁹ = 1131431701 is a prime.

It is a super-2 number, since 2×1131432213² = 2560277705228154738, 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 1131432213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131432217) 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, 285858 + ... + 289788.

It is an arithmetic number, because the mean of its divisors is an integer number (96896276).

Almost surely, 2^1131432213 is an apocalyptic number.

It is an amenable number.

1131432213 is a deficient number, since it is larger than the sum of its proper divisors (418908203).

1131432213 is a wasteful number, since it uses less digits than its factorization.

1131432213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6564.

The product of its digits is 432, while the sum is 21.

The square root of 1131432213 is about 33636.7687657421. The cubic root of 1131432213 is about 1042.0203002100.

Adding to 1131432213 its reverse (3122341311), we get a palindrome (4253773524).

The spelling of 1131432213 in words is "one billion, one hundred thirty-one million, four hundred thirty-two thousand, two hundred thirteen".