1311515053 has 8 divisors (see below), whose sum is σ = 1375850880. Its totient is φ = 1248453360.

The previous prime is 1311515003. The next prime is 1311515063. The reversal of 1311515053 is 3505151131.

It is a happy number.

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 1311515053 - 2²⁹ = 774644141 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 (1311515003) 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, 316425 + ... + 320542.

It is an arithmetic number, because the mean of its divisors is an integer number (171981360).

Almost surely, 2^1311515053 is an apocalyptic number.

It is an amenable number.

1311515053 is a deficient number, since it is larger than the sum of its proper divisors (64335827).

1311515053 is an equidigital number, since it uses as much as digits as its factorization.

1311515053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637067.

The product of its (nonzero) digits is 1125, while the sum is 25.

The square root of 1311515053 is about 36214.8457541931. The cubic root of 1311515053 is about 1094.6058374346.

Adding to 1311515053 its reverse (3505151131), we get a palindrome (4816666184).

The spelling of 1311515053 in words is "one billion, three hundred eleven million, five hundred fifteen thousand, fifty-three".