21114552 has 64 divisors (see below), whose sum is σ = 57024000. Its totient is φ = 6495104.

The previous prime is 21114551. The next prime is 21114557. The reversal of 21114552 is 25541112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21114551) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 15349 + ... + 16667.

It is an arithmetic number, because the mean of its divisors is an integer number (891000).

Almost surely, 2^21114552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21114552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28512000).

21114552 is an abundant number, since it is smaller than the sum of its proper divisors (35909448).

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

21114552 is a wasteful number, since it uses less digits than its factorization.

21114552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380 (or 1376 counting only the distinct ones).

The product of its digits is 400, while the sum is 21.

The square root of 21114552 is about 4595.0573445823. The cubic root of 21114552 is about 276.3931594887.

Adding to 21114552 its reverse (25541112), we get a palindrome (46655664).

The spelling of 21114552 in words is "twenty-one million, one hundred fourteen thousand, five hundred fifty-two".