1310311501 has 4 divisors (see below), whose sum is σ = 1321907292. Its totient is φ = 1298715712.

The previous prime is 1310311487. The next prime is 1310311507. The reversal of 1310311501 is 1051130131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 151930276 + 1158381225 = 12326^2 + 34035^2 .

It is a cyclic number.

It is not a de Polignac number, because 1310311501 - 2⁵ = 1310311469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1310311507) 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, 5797726 + ... + 5797951.

It is an arithmetic number, because the mean of its divisors is an integer number (330476823).

Almost surely, 2^1310311501 is an apocalyptic number.

It is an amenable number.

1310311501 is a deficient number, since it is larger than the sum of its proper divisors (11595791).

1310311501 is a wasteful number, since it uses less digits than its factorization.

1310311501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11595790.

The product of its (nonzero) digits is 45, while the sum is 16.

The square root of 1310311501 is about 36198.2251084221. The cubic root of 1310311501 is about 1094.2709020899.

Adding to 1310311501 its reverse (1051130131), we get a palindrome (2361441632).

The spelling of 1310311501 in words is "one billion, three hundred ten million, three hundred eleven thousand, five hundred one".