211223251344 has 40 divisors (see below), whose sum is σ = 623611504960. Its totient is φ = 60349500288.

The previous prime is 211223251333. The next prime is 211223251367. The reversal of 211223251344 is 443152322112.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 314319979 + ... + 314320650.

It is an arithmetic number, because the mean of its divisors is an integer number (15590287624).

Almost surely, 2^211223251344 is an apocalyptic number.

211223251344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

211223251344 is an abundant number, since it is smaller than the sum of its proper divisors (412388253616).

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

211223251344 is a wasteful number, since it uses less digits than its factorization.

211223251344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628640647 (or 628640641 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

Adding to 211223251344 its reverse (443152322112), we get a palindrome (654375573456).

The spelling of 211223251344 in words is "two hundred eleven billion, two hundred twenty-three million, two hundred fifty-one thousand, three hundred forty-four".