1351243818 has 48 divisors (see below), whose sum is σ = 3011744736. Its totient is φ = 437663520.

The previous prime is 1351243781. The next prime is 1351243837. The reversal of 1351243818 is 8183421531.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83721 + ... + 98547.

It is an arithmetic number, because the mean of its divisors is an integer number (62744682).

Almost surely, 2^1351243818 is an apocalyptic number.

1351243818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1351243818 is an abundant number, since it is smaller than the sum of its proper divisors (1660500918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1351243818 is a wasteful number, since it uses less digits than its factorization.

1351243818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14979 (or 14976 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 1351243818 is about 36759.2684638854. The cubic root of 1351243818 is about 1105.5487724162.

The spelling of 1351243818 in words is "one billion, three hundred fifty-one million, two hundred forty-three thousand, eight hundred eighteen".