311601361 has 4 divisors (see below), whose sum is σ = 316882800. Its totient is φ = 306319924.

The previous prime is 311601341. The next prime is 311601377. The reversal of 311601361 is 163106113.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 163106113 = 163 ⋅1000651.

It is a cyclic number.

It is not a de Polignac number, because 311601361 - 2⁷ = 311601233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311601331) 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, 2640631 + ... + 2640748.

It is an arithmetic number, because the mean of its divisors is an integer number (79220700).

Almost surely, 2^311601361 is an apocalyptic number.

It is an amenable number.

311601361 is a deficient number, since it is larger than the sum of its proper divisors (5281439).

311601361 is an equidigital number, since it uses as much as digits as its factorization.

311601361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5281438.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 311601361 is about 17652.2338812967. The cubic root of 311601361 is about 677.9533045636.

Adding to 311601361 its reverse (163106113), we get a palindrome (474707474).

The spelling of 311601361 in words is "three hundred eleven million, six hundred one thousand, three hundred sixty-one".