1131511217 has 8 divisors (see below), whose sum is σ = 1134988224. Its totient is φ = 1128040848.

The previous prime is 1131511189. The next prime is 1131511247. The reversal of 1131511217 is 7121151311.

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 1131511217 - 2¹⁸ = 1131249073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131511192 and 1131511201.

It is not an unprimeable number, because it can be changed into a prime (1131511247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 732548 + ... + 734090.

It is an arithmetic number, because the mean of its divisors is an integer number (141873528).

Almost surely, 2^1131511217 is an apocalyptic number.

It is an amenable number.

1131511217 is a deficient number, since it is larger than the sum of its proper divisors (3477007).

1131511217 is a wasteful number, since it uses less digits than its factorization.

1131511217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3319.

The product of its digits is 210, while the sum is 23.

The square root of 1131511217 is about 33637.9431148814. The cubic root of 1131511217 is about 1042.0445532040.

Adding to 1131511217 its reverse (7121151311), we get a palindrome (8252662528).

The spelling of 1131511217 in words is "one billion, one hundred thirty-one million, five hundred eleven thousand, two hundred seventeen".