1316216131 has 4 divisors (see below), whose sum is σ = 1316479264. Its totient is φ = 1315953000.

The previous prime is 1316216119. The next prime is 1316216137. The reversal of 1316216131 is 1316126131.

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

It is a cyclic number.

It is not a de Polignac number, because 1316216131 - 2⁷ = 1316216003 is a prime.

It is a super-2 number, since 2×1316216131² = 3464849807009218322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1316216096 and 1316216105.

It is not an unprimeable number, because it can be changed into a prime (1316216137) 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, 123915 + ... + 134116.

It is an arithmetic number, because the mean of its divisors is an integer number (329119816).

Almost surely, 2^1316216131 is an apocalyptic number.

1316216131 is a deficient number, since it is larger than the sum of its proper divisors (263133).

1316216131 is an equidigital number, since it uses as much as digits as its factorization.

1316216131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263132.

The product of its digits is 648, while the sum is 25.

The square root of 1316216131 is about 36279.6930940712. The cubic root of 1316216131 is about 1095.9121361512.

Subtracting from 1316216131 its reverse (1316126131), we obtain a square (90000 = 300²).

The spelling of 1316216131 in words is "one billion, three hundred sixteen million, two hundred sixteen thousand, one hundred thirty-one".