211443423402 has 16 divisors (see below), whose sum is σ = 423863496000. Its totient is φ = 70318366272.

The previous prime is 211443423349. The next prime is 211443423407. The reversal of 211443423402 is 204324344112.

It is a self number, because there is not a number n which added to its sum of digits gives 211443423402.

It is not an unprimeable number, because it can be changed into a prime (211443423407) 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, 40690902 + ... + 40696097.

It is an arithmetic number, because the mean of its divisors is an integer number (26491468500).

Almost surely, 2^211443423402 is an apocalyptic number.

211443423402 is an abundant number, since it is smaller than the sum of its proper divisors (212420072598).

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

211443423402 is a wasteful number, since it uses less digits than its factorization.

211443423402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81387437.

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

Adding to 211443423402 its reverse (204324344112), we get a palindrome (415767767514).

The spelling of 211443423402 in words is "two hundred eleven billion, four hundred forty-three million, four hundred twenty-three thousand, four hundred two".