1313143581 has 8 divisors (see below), whose sum is σ = 1771953120. Its totient is φ = 864881552.

The previous prime is 1313143567. The next prime is 1313143583. The reversal of 1313143581 is 1853413131.

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

It is a cyclic number.

It is not a de Polignac number, because 1313143581 - 2⁵ = 1313143549 is a prime.

It is a super-2 number, since 2×1313143581² = 3448692128643007122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313143583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2636586 + ... + 2637083.

It is an arithmetic number, because the mean of its divisors is an integer number (221494140).

Almost surely, 2^1313143581 is an apocalyptic number.

It is an amenable number.

1313143581 is a deficient number, since it is larger than the sum of its proper divisors (458809539).

1313143581 is an equidigital number, since it uses as much as digits as its factorization.

1313143581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5273755.

The product of its digits is 4320, while the sum is 30.

The square root of 1313143581 is about 36237.3230385469. The cubic root of 1313143581 is about 1095.0587128919.

The spelling of 1313143581 in words is "one billion, three hundred thirteen million, one hundred forty-three thousand, five hundred eighty-one".