1313154521 has 4 divisors (see below), whose sum is σ = 1500748032. Its totient is φ = 1125561012.

The previous prime is 1313154509. The next prime is 1313154527. The reversal of 1313154521 is 1254513131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1254513131 = 2707 ⋅463433.

It is a cyclic number.

It is not a de Polignac number, because 1313154521 - 2³⁰ = 239412697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1313154527) 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, 93796745 + ... + 93796758.

It is an arithmetic number, because the mean of its divisors is an integer number (375187008).

Almost surely, 2^1313154521 is an apocalyptic number.

It is an amenable number.

1313154521 is a deficient number, since it is larger than the sum of its proper divisors (187593511).

1313154521 is an equidigital number, since it uses as much as digits as its factorization.

1313154521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187593510.

The product of its digits is 1800, while the sum is 26.

The square root of 1313154521 is about 36237.4739875726. The cubic root of 1313154521 is about 1095.0617539174.

Adding to 1313154521 its reverse (1254513131), we get a palindrome (2567667652).

The spelling of 1313154521 in words is "one billion, three hundred thirteen million, one hundred fifty-four thousand, five hundred twenty-one".