311660401 has 16 divisors (see below), whose sum is σ = 355512640. Its totient is φ = 270838080.

The previous prime is 311660383. The next prime is 311660471. The reversal of 311660401 is 104066113.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 311660401 - 2⁵ = 311660369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311660471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36391 + ... + 44131.

It is an arithmetic number, because the mean of its divisors is an integer number (22219540).

Almost surely, 2^311660401 is an apocalyptic number.

It is an amenable number.

311660401 is a deficient number, since it is larger than the sum of its proper divisors (43852239).

311660401 is a wasteful number, since it uses less digits than its factorization.

311660401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7936.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 311660401 is about 17653.9061116796. The cubic root of 311660401 is about 677.9961197760.

The spelling of 311660401 in words is "three hundred eleven million, six hundred sixty thousand, four hundred one".