311061321 has 6 divisors (see below), whose sum is σ = 449310810. Its totient is φ = 207374208.

The previous prime is 311061313. The next prime is 311061329. The reversal of 311061321 is 123160113.

311061321 is a `hidden beast` number, since 31 + 1 + 0 + 613 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (311061313) and next prime (311061329).

It can be written as a sum of positive squares in only one way, i.e., 160655625 + 150405696 = 12675^2 + 12264^2 .

It is not a de Polignac number, because 311061321 - 2³ = 311061313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311061294 and 311061303.

It is not an unprimeable number, because it can be changed into a prime (311061329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17281176 + ... + 17281193.

It is an arithmetic number, because the mean of its divisors is an integer number (74885135).

Almost surely, 2^311061321 is an apocalyptic number.

It is an amenable number.

311061321 is a deficient number, since it is larger than the sum of its proper divisors (138249489).

311061321 is a wasteful number, since it uses less digits than its factorization.

311061321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34562375 (or 34562372 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 311061321 is about 17636.9306003057. The cubic root of 311061321 is about 677.5614217903.

The spelling of 311061321 in words is "three hundred eleven million, sixty-one thousand, three hundred twenty-one".