1133145231 has 16 divisors (see below), whose sum is σ = 1548923904. Its totient is φ = 736521824.

The previous prime is 1133145227. The next prime is 1133145253. The reversal of 1133145231 is 1325413311.

It is a cyclic number.

It is not a de Polignac number, because 1133145231 - 2² = 1133145227 is a prime.

It is a super-2 number, since 2×1133145231² = 2568036229076086722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1133140231) 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, 21805 + ... + 52361.

It is an arithmetic number, because the mean of its divisors is an integer number (96807744).

Almost surely, 2^1133145231 is an apocalyptic number.

1133145231 is a deficient number, since it is larger than the sum of its proper divisors (415778673).

1133145231 is a wasteful number, since it uses less digits than its factorization.

1133145231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30870.

The product of its digits is 1080, while the sum is 24.

The square root of 1133145231 is about 33662.2226093287. Note that the first 3 decimals coincide. The cubic root of 1133145231 is about 1042.5459170409.

Adding to 1133145231 its reverse (1325413311), we get a palindrome (2458558542).

The spelling of 1133145231 in words is "one billion, one hundred thirty-three million, one hundred forty-five thousand, two hundred thirty-one".