211444233402 has 16 divisors (see below), whose sum is σ = 422937748800. Its totient is φ = 70473197472.

The previous prime is 211444233391. The next prime is 211444233409. The reversal of 211444233402 is 204332444112.

It is a self number, because there is not a number n which added to its sum of digits gives 211444233402.

It is not an unprimeable number, because it can be changed into a prime (211444233409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1997523 + ... + 2100710.

It is an arithmetic number, because the mean of its divisors is an integer number (26433609300).

Almost surely, 2^211444233402 is an apocalyptic number.

211444233402 is an abundant number, since it is smaller than the sum of its proper divisors (211493515398).

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

211444233402 is a wasteful number, since it uses less digits than its factorization.

211444233402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4106837.

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

Adding to 211444233402 its reverse (204332444112), we get a palindrome (415776677514).

The spelling of 211444233402 in words is "two hundred eleven billion, four hundred forty-four million, two hundred thirty-three thousand, four hundred two".