211444233240 has 64 divisors (see below), whose sum is σ = 634397608800. Its totient is φ = 56379359232.

The previous prime is 211444233223. The next prime is 211444233263. The reversal of 211444233240 is 42332444112.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 211444233198 and 211444233207.

It is a congruent number.

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, 1159314 + ... + 1329246.

Almost surely, 2^211444233240 is an apocalyptic number.

211444233240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211444233240 is an abundant number, since it is smaller than the sum of its proper divisors (422953375560).

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

211444233240 is a wasteful number, since it uses less digits than its factorization.

211444233240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180316 (or 180312 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 211444233240 its reverse (42332444112), we get a palindrome (253776677352).

The spelling of 211444233240 in words is "two hundred eleven billion, four hundred forty-four million, two hundred thirty-three thousand, two hundred forty".