21044325 has 12 divisors (see below), whose sum is σ = 34793408. Its totient is φ = 11223600.

The previous prime is 21044311. The next prime is 21044341. The reversal of 21044325 is 52344012.

It is not a de Polignac number, because 21044325 - 2⁵ = 21044293 is a prime.

It is a super-2 number, since 2×21044325² = 885727229411250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 140221 + ... + 140370.

Almost surely, 2^21044325 is an apocalyptic number.

21044325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21044325 is a deficient number, since it is larger than the sum of its proper divisors (13749083).

21044325 is a wasteful number, since it uses less digits than its factorization.

21044325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280604 (or 280599 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 21044325 is about 4587.4093996503. The cubic root of 21044325 is about 276.0863912502.

Adding to 21044325 its reverse (52344012), we get a palindrome (73388337).

The spelling of 21044325 in words is "twenty-one million, forty-four thousand, three hundred twenty-five".