1131442217 has 2 divisors, whose sum is σ = 1131442218. Its totient is φ = 1131442216.

The previous prime is 1131442211. The next prime is 1131442237. The reversal of 1131442217 is 7122441311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 959202841 + 172239376 = 30971^2 + 13124^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131442217 - 2²⁶ = 1064333353 is a prime.

It is a super-2 number, since 2×1131442217² = 2560322980819750178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1131442211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565721108 + 565721109.

It is an arithmetic number, because the mean of its divisors is an integer number (565721109).

Almost surely, 2^1131442217 is an apocalyptic number.

It is an amenable number.

1131442217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131442217 is an equidigital number, since it uses as much as digits as its factorization.

1131442217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 26.

The square root of 1131442217 is about 33636.9174717304. The cubic root of 1131442217 is about 1042.0233713442.

Adding to 1131442217 its reverse (7122441311), we get a palindrome (8253883528).

The spelling of 1131442217 in words is "one billion, one hundred thirty-one million, four hundred forty-two thousand, two hundred seventeen".