1318681522 has 8 divisors (see below), whose sum is σ = 1978178796. Its totient is φ = 659288592.

The previous prime is 1318681519. The next prime is 1318681523. The reversal of 1318681522 is 2251868131.

It can be written as a sum of positive squares in 2 ways, for example, as 1301117041 + 17564481 = 36071^2 + 4191^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1318681523) 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, 27648 + ... + 58324.

Almost surely, 2^1318681522 is an apocalyptic number.

1318681522 is a deficient number, since it is larger than the sum of its proper divisors (659497274).

1318681522 is a wasteful number, since it uses less digits than its factorization.

1318681522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52172.

The product of its digits is 23040, while the sum is 37.

The square root of 1318681522 is about 36313.6547596080. The cubic root of 1318681522 is about 1096.5959566550.

The spelling of 1318681522 in words is "one billion, three hundred eighteen million, six hundred eighty-one thousand, five hundred twenty-two".