1318227533 has 4 divisors (see below), whose sum is σ = 1506545760. Its totient is φ = 1129909308.

The previous prime is 1318227523. The next prime is 1318227553. The reversal of 1318227533 is 3357228131.

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: 3357228131 = 53 ⋅63343927.

It is a cyclic number.

It is not a de Polignac number, because 1318227533 - 2¹⁴ = 1318211149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1318227493 and 1318227502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318227523) 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, 94159103 + ... + 94159116.

It is an arithmetic number, because the mean of its divisors is an integer number (376636440).

Almost surely, 2^1318227533 is an apocalyptic number.

It is an amenable number.

1318227533 is a deficient number, since it is larger than the sum of its proper divisors (188318227).

1318227533 is an equidigital number, since it uses as much as digits as its factorization.

1318227533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188318226.

The product of its digits is 30240, while the sum is 35.

The square root of 1318227533 is about 36307.4032808737. The cubic root of 1318227533 is about 1096.4700987088.

The spelling of 1318227533 in words is "one billion, three hundred eighteen million, two hundred twenty-seven thousand, five hundred thirty-three".