311402101 has 4 divisors (see below), whose sum is σ = 319818412. Its totient is φ = 302985792.

The previous prime is 311402071. The next prime is 311402111. The reversal of 311402101 is 101204113.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 203034001 + 108368100 = 14249^2 + 10410^2 .

It is a cyclic number.

It is not a de Polignac number, because 311402101 - 2⁹ = 311401589 is a prime.

It is a super-5 number, since 5×311402101⁵ (a number of 44 digits) contains 55555 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311402111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4208100 + ... + 4208173.

It is an arithmetic number, because the mean of its divisors is an integer number (79954603).

Almost surely, 2^311402101 is an apocalyptic number.

It is an amenable number.

311402101 is a deficient number, since it is larger than the sum of its proper divisors (8416311).

311402101 is an equidigital number, since it uses as much as digits as its factorization.

311402101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8416310.

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

The square root of 311402101 is about 17646.5889338421. The cubic root of 311402101 is about 677.8087632813.

Adding to 311402101 its reverse (101204113), we get a palindrome (412606214).

The spelling of 311402101 in words is "three hundred eleven million, four hundred two thousand, one hundred one".