211000440040 has 64 divisors (see below), whose sum is σ = 511332670800. Its totient is φ = 77898350592.

The previous prime is 211000440037. The next prime is 211000440073. The reversal of 211000440040 is 40044000112.

It can be written as a sum of positive squares in 8 ways, for example, as 56961459556 + 154038980484 = 238666^2 + 392478^2 .

It is a junction number, because it is equal to n+sod(n) for n = 211000439996 and 211000440023.

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, 5372314 + ... + 5411446.

Almost surely, 2^211000440040 is an apocalyptic number.

211000440040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211000440040 is an abundant number, since it is smaller than the sum of its proper divisors (300332230760).

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

211000440040 is a wasteful number, since it uses less digits than its factorization.

211000440040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49526 (or 49522 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 211000440040 its reverse (40044000112), we get a palindrome (251044440152).

The spelling of 211000440040 in words is "two hundred eleven billion, four hundred forty thousand, forty".