1153431211 has 4 divisors (see below), whose sum is σ = 1164851424. Its totient is φ = 1142011000.

The previous prime is 1153431203. The next prime is 1153431241. The reversal of 1153431211 is 1121343511.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1153431211 - 2³ = 1153431203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1153431241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5709955 + ... + 5710156.

It is an arithmetic number, because the mean of its divisors is an integer number (291212856).

Almost surely, 2^1153431211 is an apocalyptic number.

1153431211 is a deficient number, since it is larger than the sum of its proper divisors (11420213).

1153431211 is a wasteful number, since it uses less digits than its factorization.

1153431211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11420212.

The product of its digits is 360, while the sum is 22.

The square root of 1153431211 is about 33962.2026818050. The cubic root of 1153431211 is about 1048.7305023218.

Adding to 1153431211 its reverse (1121343511), we get a palindrome (2274774722).

The spelling of 1153431211 in words is "one billion, one hundred fifty-three million, four hundred thirty-one thousand, two hundred eleven".