1313206501 has 4 divisors (see below), whose sum is σ = 1314050400. Its totient is φ = 1312362604.

The previous prime is 1313206457. The next prime is 1313206529. The reversal of 1313206501 is 1056023131.

It is a happy number.

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: 1056023131 = 2897 ⋅364523.

It is a cyclic number.

It is not a de Polignac number, because 1313206501 - 2¹³ = 1313198309 is a prime.

It is a super-2 number, since 2×1313206501² = 3449022628537326002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313206571) 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, 419611 + ... + 422728.

It is an arithmetic number, because the mean of its divisors is an integer number (328512600).

Almost surely, 2^1313206501 is an apocalyptic number.

It is an amenable number.

1313206501 is a deficient number, since it is larger than the sum of its proper divisors (843899).

1313206501 is an equidigital number, since it uses as much as digits as its factorization.

1313206501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843898.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 1313206501 is about 36238.1911938220. The cubic root of 1313206501 is about 1095.0762027269.

Adding to 1313206501 its reverse (1056023131), we get a palindrome (2369229632).

The spelling of 1313206501 in words is "one billion, three hundred thirteen million, two hundred six thousand, five hundred one".