211311313444 has 48 divisors (see below), whose sum is σ = 485308293120. Its totient is φ = 77995971360.

The previous prime is 211311313363. The next prime is 211311313519. The reversal of 211311313444 is 444313113112.

It is a super-2 number, since 2×211311313444² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18048772 + ... + 18060475.

It is an arithmetic number, because the mean of its divisors is an integer number (10110589440).

Almost surely, 2^211311313444 is an apocalyptic number.

It is an amenable number.

211311313444 is an abundant number, since it is smaller than the sum of its proper divisors (273996979676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211311313444 is a wasteful number, since it uses less digits than its factorization.

211311313444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36109288 (or 36109286 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

Adding to 211311313444 its reverse (444313113112), we get a palindrome (655624426556).

The spelling of 211311313444 in words is "two hundred eleven billion, three hundred eleven million, three hundred thirteen thousand, four hundred forty-four".