1115243533 has 4 divisors (see below), whose sum is σ = 1119583260. Its totient is φ = 1110903808.

The previous prime is 1115243497. The next prime is 1115243539. The reversal of 1115243533 is 3353425111.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 538379209 + 576864324 = 23203^2 + 24018^2 .

It is a cyclic number.

It is not a de Polignac number, because 1115243533 - 2²¹ = 1113146381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115243539) 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, 2169478 + ... + 2169991.

It is an arithmetic number, because the mean of its divisors is an integer number (279895815).

Almost surely, 2^1115243533 is an apocalyptic number.

It is an amenable number.

1115243533 is a deficient number, since it is larger than the sum of its proper divisors (4339727).

1115243533 is an equidigital number, since it uses as much as digits as its factorization.

1115243533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4339726.

The product of its digits is 5400, while the sum is 28.

The square root of 1115243533 is about 33395.2621340213. The cubic root of 1115243533 is about 1037.0266196365.

Adding to 1115243533 its reverse (3353425111), we get a palindrome (4468668644).

The spelling of 1115243533 in words is "one billion, one hundred fifteen million, two hundred forty-three thousand, five hundred thirty-three".