211444323402 has 64 divisors (see below), whose sum is σ = 466071217920. Its totient is φ = 63554803200.

The previous prime is 211444323401. The next prime is 211444323407. The reversal of 211444323402 is 204323444112.

It is a self number, because there is not a number n which added to its sum of digits gives 211444323402.

It is not an unprimeable number, because it can be changed into a prime (211444323401) 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, 428502 + ... + 778782.

It is an arithmetic number, because the mean of its divisors is an integer number (7282362780).

Almost surely, 2^211444323402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211444323402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233035608960).

211444323402 is an abundant number, since it is smaller than the sum of its proper divisors (254626894518).

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

211444323402 is a wasteful number, since it uses less digits than its factorization.

211444323402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350479.

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

Adding to 211444323402 its reverse (204323444112), we get a palindrome (415767767514).

The spelling of 211444323402 in words is "two hundred eleven billion, four hundred forty-four million, three hundred twenty-three thousand, four hundred two".