31311002223311 has 16 divisors (see below), whose sum is σ = 31580656481280. Its totient is φ = 31041717557760.

The previous prime is 31311002223299. The next prime is 31311002223317. The reversal of 31311002223311 is 11332220011313.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31311002223311 is a prime.

It is a super-2 number, since 2×31311002223311² (a number of 28 digits) contains 22 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 (31311002223317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1142348375 + ... + 1142375783.

It is an arithmetic number, because the mean of its divisors is an integer number (1973791030080).

Almost surely, 2^{31311002223311} is an apocalyptic number.

31311002223311 is a deficient number, since it is larger than the sum of its proper divisors (269654257969).

31311002223311 is a wasteful number, since it uses less digits than its factorization.

31311002223311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33794.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 31311002223311 its reverse (11332220011313), we get a palindrome (42643222234624).

The spelling of 31311002223311 in words is "thirty-one trillion, three hundred eleven billion, two million, two hundred twenty-three thousand, three hundred eleven".