311021401 has 4 divisors (see below), whose sum is σ = 311138100. Its totient is φ = 310904704.

The previous prime is 311021383. The next prime is 311021413. The reversal of 311021401 is 104120113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104120113 = 487 ⋅213799.

It can be written as a sum of positive squares in 2 ways, for example, as 303595776 + 7425625 = 17424^2 + 2725^2 .

It is a cyclic number.

It is not a de Polignac number, because 311021401 - 2⁵ = 311021369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311021101) 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, 54256 + ... + 59713.

It is an arithmetic number, because the mean of its divisors is an integer number (77784525).

Almost surely, 2^311021401 is an apocalyptic number.

It is an amenable number.

311021401 is a deficient number, since it is larger than the sum of its proper divisors (116699).

311021401 is a wasteful number, since it uses less digits than its factorization.

311021401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116698.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 311021401 is about 17635.7988477982. The cubic root of 311021401 is about 677.5324356416.

Adding to 311021401 its reverse (104120113), we get a palindrome (415141514).

The spelling of 311021401 in words is "three hundred eleven million, twenty-one thousand, four hundred one".