21235052 has 24 divisors (see below), whose sum is σ = 37933056. Its totient is φ = 10399568.

The previous prime is 21235051. The next prime is 21235061. The reversal of 21235052 is 25053212.

It is not an unprimeable number, because it can be changed into a prime (21235051) 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, 55253 + ... + 55635.

It is an arithmetic number, because the mean of its divisors is an integer number (1580544).

Almost surely, 2^21235052 is an apocalyptic number.

It is an amenable number.

21235052 is a deficient number, since it is larger than the sum of its proper divisors (16698004).

21235052 is a wasteful number, since it uses less digits than its factorization.

21235052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637 (or 635 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 21235052 is about 4608.1506051777. The cubic root of 21235052 is about 276.9179510843.

Adding to 21235052 its reverse (25053212), we get a palindrome (46288264).

It can be divided in two parts, 2123 and 5052, that multiplied together give a triangular number (10725396 = T₄₆₃₁).

The spelling of 21235052 in words is "twenty-one million, two hundred thirty-five thousand, fifty-two".