211054643340 has 96 divisors (see below), whose sum is σ = 627942538944. Its totient is φ = 52781998080.

The previous prime is 211054643329. The next prime is 211054643341. The reversal of 211054643340 is 43346450112.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (211054643341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81559 + ... + 654798.

It is an arithmetic number, because the mean of its divisors is an integer number (6541068114).

Almost surely, 2^211054643340 is an apocalyptic number.

211054643340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211054643340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (313971269472).

211054643340 is an abundant number, since it is smaller than the sum of its proper divisors (416887895604).

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

211054643340 is a wasteful number, since it uses less digits than its factorization.

211054643340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736667 (or 736665 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The spelling of 211054643340 in words is "two hundred eleven billion, fifty-four million, six hundred forty-three thousand, three hundred forty".