1311513263 has 8 divisors (see below), whose sum is σ = 1389924432. Its totient is φ = 1233242496.

The previous prime is 1311513251. The next prime is 1311513271. The reversal of 1311513263 is 3623151131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1311513263 - 2¹⁶ = 1311447727 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 (1311513293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15545 + ... + 53522.

It is an arithmetic number, because the mean of its divisors is an integer number (173740554).

Almost surely, 2^1311513263 is an apocalyptic number.

1311513263 is a deficient number, since it is larger than the sum of its proper divisors (78411169).

1311513263 is a wasteful number, since it uses less digits than its factorization.

1311513263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70201.

The product of its digits is 1620, while the sum is 26.

The square root of 1311513263 is about 36214.8210405629. The cubic root of 1311513263 is about 1094.6053394494.

Adding to 1311513263 its reverse (3623151131), we get a palindrome (4934664394).

The spelling of 1311513263 in words is "one billion, three hundred eleven million, five hundred thirteen thousand, two hundred sixty-three".