211231052 has 12 divisors (see below), whose sum is σ = 391398840. Its totient is φ = 99402816.

The previous prime is 211231051. The next prime is 211231063. The reversal of 211231052 is 250132112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 211231052.

It is not an unprimeable number, because it can be changed into a prime (211231051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1553102 + ... + 1553237.

It is an arithmetic number, because the mean of its divisors is an integer number (32616570).

Almost surely, 2^211231052 is an apocalyptic number.

It is an amenable number.

211231052 is a deficient number, since it is larger than the sum of its proper divisors (180167788).

211231052 is a wasteful number, since it uses less digits than its factorization.

211231052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3106360 (or 3106358 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 211231052 is about 14533.7900081156. The cubic root of 211231052 is about 595.5514056036.

Adding to 211231052 its reverse (250132112), we get a palindrome (461363164).

The spelling of 211231052 in words is "two hundred eleven million, two hundred thirty-one thousand, fifty-two".