211053438 has 40 divisors (see below), whose sum is σ = 477635400. Its totient is φ = 69649200.

The previous prime is 211053433. The next prime is 211053449. The reversal of 211053438 is 834350112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211053433) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9913 + ... + 22811.

It is an arithmetic number, because the mean of its divisors is an integer number (11940885).

Almost surely, 2^211053438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211053438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238817700).

211053438 is an abundant number, since it is smaller than the sum of its proper divisors (266581962).

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

211053438 is a wasteful number, since it uses less digits than its factorization.

211053438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13014 (or 13005 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 211053438 is about 14527.6783417035. The cubic root of 211053438 is about 595.3844353149.

The spelling of 211053438 in words is "two hundred eleven million, fifty-three thousand, four hundred thirty-eight".