21711052 has 12 divisors (see below), whose sum is σ = 41448456. Its totient is φ = 9868640.

The previous prime is 21711043. The next prime is 21711071. The reversal of 21711052 is 25011712.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246673 + ... + 246760.

It is an arithmetic number, because the mean of its divisors is an integer number (3454038).

Almost surely, 2^21711052 is an apocalyptic number.

21711052 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21711052 is a deficient number, since it is larger than the sum of its proper divisors (19737404).

21711052 is a wasteful number, since it uses less digits than its factorization.

21711052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493448 (or 493446 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 21711052 is about 4659.5119916146. The cubic root of 21711052 is about 278.9717900761.

Adding to 21711052 its reverse (25011712), we get a palindrome (46722764).

It can be divided in two parts, 2171 and 1052, that added together give a palindrome (3223).

The spelling of 21711052 in words is "twenty-one million, seven hundred eleven thousand, fifty-two".