211233240440 has 32 divisors (see below), whose sum is σ = 475970716080. Its totient is φ = 84369576192.

The previous prime is 211233240349. The next prime is 211233240457. The reversal of 211233240440 is 44042332112.

It is a congruent 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, 3838589 + ... + 3893228.

Almost surely, 2^211233240440 is an apocalyptic number.

211233240440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211233240440 is an abundant number, since it is smaller than the sum of its proper divisors (264737475640).

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

211233240440 is a wasteful number, since it uses less digits than its factorization.

211233240440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7732511 (or 7732507 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 211233240440 its reverse (44042332112), we get a palindrome (255275572552).

The spelling of 211233240440 in words is "two hundred eleven billion, two hundred thirty-three million, two hundred forty thousand, four hundred forty".