1801315613 has 2 divisors, whose sum is σ = 1801315614. Its totient is φ = 1801315612.

The previous prime is 1801315609. The next prime is 1801315627. The reversal of 1801315613 is 3165131081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1655920249 + 145395364 = 40693^2 + 12058^2 .

It is a cyclic number.

It is not a de Polignac number, because 1801315613 - 2² = 1801315609 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1801315673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 900657806 + 900657807.

It is an arithmetic number, because the mean of its divisors is an integer number (900657807).

Almost surely, 2^1801315613 is an apocalyptic number.

It is an amenable number.

1801315613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1801315613 is an equidigital number, since it uses as much as digits as its factorization.

1801315613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 1801315613 is about 42441.9086870513. The cubic root of 1801315613 is about 1216.7366907926.

Adding to 1801315613 its reverse (3165131081), we get a palindrome (4966446694).

The spelling of 1801315613 in words is "one billion, eight hundred one million, three hundred fifteen thousand, six hundred thirteen".