1311446523 has 4 divisors (see below), whose sum is σ = 1748595368. Its totient is φ = 874297680.

The previous prime is 1311446489. The next prime is 1311446527. The reversal of 1311446523 is 3256441131.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1311446523 - 2¹² = 1311442427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311446527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218574418 + ... + 218574423.

It is an arithmetic number, because the mean of its divisors is an integer number (437148842).

Almost surely, 2^1311446523 is an apocalyptic number.

1311446523 is a deficient number, since it is larger than the sum of its proper divisors (437148845).

1311446523 is an equidigital number, since it uses as much as digits as its factorization.

1311446523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437148844.

The product of its digits is 8640, while the sum is 30.

The square root of 1311446523 is about 36213.8995828950. The cubic root of 1311446523 is about 1094.5867717887.

Adding to 1311446523 its reverse (3256441131), we get a palindrome (4567887654).

The spelling of 1311446523 in words is "one billion, three hundred eleven million, four hundred forty-six thousand, five hundred twenty-three".