1311013157 has 8 divisors (see below), whose sum is σ = 1432910592. Its totient is φ = 1194091200.

The previous prime is 1311013147. The next prime is 1311013163. The reversal of 1311013157 is 7513101131.

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 1311013157 - 2²⁰ = 1309964581 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 (1311013117) 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, 1243319 + ... + 1244372.

It is an arithmetic number, because the mean of its divisors is an integer number (179113824).

Almost surely, 2^1311013157 is an apocalyptic number.

1311013157 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1311013157 is a deficient number, since it is larger than the sum of its proper divisors (121897435).

1311013157 is a wasteful number, since it uses less digits than its factorization.

1311013157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2487739.

The product of its (nonzero) digits is 315, while the sum is 23.

The square root of 1311013157 is about 36207.9156677100. The cubic root of 1311013157 is about 1094.4661901911.

Adding to 1311013157 its reverse (7513101131), we get a palindrome (8824114288).

The spelling of 1311013157 in words is "one billion, three hundred eleven million, thirteen thousand, one hundred fifty-seven".