1318998131 has 6 divisors (see below), whose sum is σ = 1449807996. Its totient is φ = 1199089100.

The previous prime is 1318998127. The next prime is 1318998133.

1318998131 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1318998131 - 2² = 1318998127 is a prime.

It is a super-2 number, since 2×1318998131² = 3479512139162986322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1318998133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5450285 + ... + 5450526.

It is an arithmetic number, because the mean of its divisors is an integer number (241634666).

Almost surely, 2^1318998131 is an apocalyptic number.

1318998131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1318998131 is a deficient number, since it is larger than the sum of its proper divisors (130809865).

1318998131 is a wasteful number, since it uses less digits than its factorization.

1318998131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10900833 (or 10900822 counting only the distinct ones).

The product of its digits is 46656, while the sum is 44.

The square root of 1318998131 is about 36318.0138636462. The cubic root of 1318998131 is about 1096.6837120786.

The spelling of 1318998131 in words is "one billion, three hundred eighteen million, nine hundred ninety-eight thousand, one hundred thirty-one".