313537131161 has 4 divisors (see below), whose sum is σ = 313541718324. Its totient is φ = 313532544000.

The previous prime is 313537131143. The next prime is 313537131181. The reversal of 313537131161 is 161131735313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 161131735313 = 53 ⋅3040221421.

It can be written as a sum of positive squares in 2 ways, for example, as 115970215936 + 197566915225 = 340544^2 + 444485^2 .

It is a cyclic number.

It is not a de Polignac number, because 313537131161 - 2⁶ = 313537131097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313537131121) 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, 2189480 + ... + 2328281.

It is an arithmetic number, because the mean of its divisors is an integer number (78385429581).

Almost surely, 2^313537131161 is an apocalyptic number.

It is an amenable number.

313537131161 is a deficient number, since it is larger than the sum of its proper divisors (4587163).

313537131161 is an equidigital number, since it uses as much as digits as its factorization.

313537131161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4587162.

The product of its digits is 17010, while the sum is 35.

Adding to 313537131161 its reverse (161131735313), we get a palindrome (474668866474).

The spelling of 313537131161 in words is "three hundred thirteen billion, five hundred thirty-seven million, one hundred thirty-one thousand, one hundred sixty-one".