21514452 has 48 divisors (see below), whose sum is σ = 53488512. Its totient is φ = 6707200.

The previous prime is 21514439. The next prime is 21514483. The reversal of 21514452 is 25441512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53452 + ... + 53852.

It is an arithmetic number, because the mean of its divisors is an integer number (1114344).

Almost surely, 2^21514452 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 21514452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26744256).

21514452 is an abundant number, since it is smaller than the sum of its proper divisors (31974060).

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

21514452 is a wasteful number, since it uses less digits than its factorization.

21514452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688 (or 686 counting only the distinct ones).

The product of its digits is 1600, while the sum is 24.

The square root of 21514452 is about 4638.3673851906. The cubic root of 21514452 is about 278.1271781507.

Adding to 21514452 its reverse (25441512), we get a palindrome (46955964).

The spelling of 21514452 in words is "twenty-one million, five hundred fourteen thousand, four hundred fifty-two".