1118248213 has 4 divisors (see below), whose sum is σ = 1154320768. Its totient is φ = 1082175660.

The previous prime is 1118248171. The next prime is 1118248223. The reversal of 1118248213 is 3128428111.

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: 3128428111 = 17 ⋅184025183.

It is a cyclic number.

It is not a de Polignac number, because 1118248213 - 2¹³ = 1118240021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 36072523 = 1118248213 / (1 + 1 + 1 + 8 + 2 + 4 + 8 + 2 + 1 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1118248223) 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, 18036231 + ... + 18036292.

It is an arithmetic number, because the mean of its divisors is an integer number (288580192).

Almost surely, 2^1118248213 is an apocalyptic number.

It is an amenable number.

1118248213 is a deficient number, since it is larger than the sum of its proper divisors (36072555).

1118248213 is an equidigital number, since it uses as much as digits as its factorization.

1118248213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36072554.

The product of its digits is 3072, while the sum is 31.

The square root of 1118248213 is about 33440.2184950996. The cubic root of 1118248213 is about 1037.9571007153.

It can be divided in two parts, 11182 and 48213, that added together give a palindrome (59395).

The spelling of 1118248213 in words is "one billion, one hundred eighteen million, two hundred forty-eight thousand, two hundred thirteen".