1313155543 has 16 divisors (see below), whose sum is σ = 1544198656. Its totient is φ = 1093266720.

The previous prime is 1313155499. The next prime is 1313155553. The reversal of 1313155543 is 3455513131.

It is a de Polignac number, because none of the positive numbers 2^k-1313155543 is a prime.

It is a super-2 number, since 2×1313155543² = 3448754960223249698, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313155553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42430 + ... + 66532.

It is an arithmetic number, because the mean of its divisors is an integer number (96512416).

Almost surely, 2^1313155543 is an apocalyptic number.

1313155543 is a deficient number, since it is larger than the sum of its proper divisors (231043113).

1313155543 is a wasteful number, since it uses less digits than its factorization.

1313155543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24334.

The product of its digits is 13500, while the sum is 31.

The square root of 1313155543 is about 36237.4880889942. The cubic root of 1313155543 is about 1095.0620380050.

Adding to 1313155543 its reverse (3455513131), we get a palindrome (4768668674).

The spelling of 1313155543 in words is "one billion, three hundred thirteen million, one hundred fifty-five thousand, five hundred forty-three".