311103013 has 8 divisors (see below), whose sum is σ = 335188728. Its totient is φ = 287039424.

The previous prime is 311102983. The next prime is 311103019. The reversal of 311103013 is 310301113.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3969 + 311099044 = 63^2 + 17638^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311103013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311102984 and 311103002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311103019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34395 + ... + 42487.

It is an arithmetic number, because the mean of its divisors is an integer number (41898591).

Almost surely, 2^311103013 is an apocalyptic number.

It is an amenable number.

311103013 is a deficient number, since it is larger than the sum of its proper divisors (24085715).

311103013 is a wasteful number, since it uses less digits than its factorization.

311103013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11063.

The product of its (nonzero) digits is 27, while the sum is 13.

The square root of 311103013 is about 17638.1125123977. The cubic root of 311103013 is about 677.5916919513.

Adding to 311103013 its reverse (310301113), we get a palindrome (621404126).

The spelling of 311103013 in words is "three hundred eleven million, one hundred three thousand, thirteen".