21032259 has 16 divisors (see below), whose sum is σ = 29940480. Its totient is φ = 13093920.

The previous prime is 21032237. The next prime is 21032267. The reversal of 21032259 is 95223012.

It is not a de Polignac number, because 21032259 - 2⁸ = 21032003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21032299) 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, 1449 + ... + 6645.

It is an arithmetic number, because the mean of its divisors is an integer number (1871280).

Almost surely, 2^21032259 is an apocalyptic number.

21032259 is a deficient number, since it is larger than the sum of its proper divisors (8908221).

21032259 is a wasteful number, since it uses less digits than its factorization.

21032259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5290.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 21032259 is about 4586.0940897457. The cubic root of 21032259 is about 276.0336154184.

The spelling of 21032259 in words is "twenty-one million, thirty-two thousand, two hundred fifty-nine".