1113543217 has 4 divisors (see below), whose sum is σ = 1114535920. Its totient is φ = 1112550516.

The previous prime is 1113543209. The next prime is 1113543251. The reversal of 1113543217 is 7123453111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7123453111 = 89 ⋅80038799.

It is a cyclic number.

It is not a de Polignac number, because 1113543217 - 2³ = 1113543209 is a prime.

It is a super-2 number, since 2×1113543217² = 2479956992253418178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1113543257) 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, 494667 + ... + 496912.

It is an arithmetic number, because the mean of its divisors is an integer number (278633980).

Almost surely, 2^1113543217 is an apocalyptic number.

It is an amenable number.

1113543217 is a deficient number, since it is larger than the sum of its proper divisors (992703).

1113543217 is an equidigital number, since it uses as much as digits as its factorization.

1113543217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992702.

The product of its digits is 2520, while the sum is 28.

The square root of 1113543217 is about 33369.7949798916. The cubic root of 1113543217 is about 1036.4993297770.

Adding to 1113543217 its reverse (7123453111), we get a palindrome (8236996328).

The spelling of 1113543217 in words is "one billion, one hundred thirteen million, five hundred forty-three thousand, two hundred seventeen".