1313111541 has 16 divisors (see below), whose sum is σ = 2003032064. Its totient is φ = 749561904.

The previous prime is 1313111539. The next prime is 1313111549. The reversal of 1313111541 is 1451113131.

It is not a de Polignac number, because 1313111541 - 2¹ = 1313111539 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313111549) 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, 12025 + ... + 52638.

It is an arithmetic number, because the mean of its divisors is an integer number (125189504).

Almost surely, 2^1313111541 is an apocalyptic number.

It is an amenable number.

1313111541 is a deficient number, since it is larger than the sum of its proper divisors (689920523).

1313111541 is an equidigital number, since it uses as much as digits as its factorization.

1313111541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65640.

The product of its digits is 180, while the sum is 21.

The square root of 1313111541 is about 36236.8809502142. The cubic root of 1313111541 is about 1095.0498065375.

Adding to 1313111541 its reverse (1451113131), we get a palindrome (2764224672).

The spelling of 1313111541 in words is "one billion, three hundred thirteen million, one hundred eleven thousand, five hundred forty-one".