1318135225 has 48 divisors (see below), whose sum is σ = 1829615040. Its totient is φ = 933939200.

The previous prime is 1318135219. The next prime is 1318135229. The reversal of 1318135225 is 5225318131.

It is not a de Polignac number, because 1318135225 - 2²³ = 1309746617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1318135229) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2222529 + ... + 2223121.

It is an arithmetic number, because the mean of its divisors is an integer number (38116980).

Almost surely, 2^1318135225 is an apocalyptic number.

It is an amenable number.

1318135225 is a deficient number, since it is larger than the sum of its proper divisors (511479815).

1318135225 is a wasteful number, since it uses less digits than its factorization.

1318135225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810 (or 805 counting only the distinct ones).

The product of its digits is 7200, while the sum is 31.

The square root of 1318135225 is about 36306.1320578219. The cubic root of 1318135225 is about 1096.4445049167. Note that the first 3 decimals are identical.

The spelling of 1318135225 in words is "one billion, three hundred eighteen million, one hundred thirty-five thousand, two hundred twenty-five".