311213032133 has 8 divisors (see below), whose sum is σ = 334033650648. Its totient is φ = 288893965824.

The previous prime is 311213032121. The next prime is 311213032157. The reversal of 311213032133 is 331230312113.

It can be written as a sum of positive squares in 4 ways, for example, as 18858704929 + 292354327204 = 137327^2 + 540698^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 311213032133 - 2⁶ = 311213032069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311213032099 and 311213032108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311213032183) 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, 125386766 + ... + 125389247.

It is an arithmetic number, because the mean of its divisors is an integer number (41754206331).

Almost surely, 2^311213032133 is an apocalyptic number.

It is an amenable number.

311213032133 is a deficient number, since it is larger than the sum of its proper divisors (22820618515).

311213032133 is a wasteful number, since it uses less digits than its factorization.

311213032133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250776103.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 311213032133 its reverse (331230312113), we get a palindrome (642443344246).

The spelling of 311213032133 in words is "three hundred eleven billion, two hundred thirteen million, thirty-two thousand, one hundred thirty-three".