21519083 has 2 divisors, whose sum is σ = 21519084. Its totient is φ = 21519082.

The previous prime is 21519079. The next prime is 21519101. The reversal of 21519083 is 38091512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21519083 - 2² = 21519079 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21519583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10759541 + 10759542.

It is an arithmetic number, because the mean of its divisors is an integer number (10759542).

Almost surely, 2^21519083 is an apocalyptic number.

21519083 is a deficient number, since it is larger than the sum of its proper divisors (1).

21519083 is an equidigital number, since it uses as much as digits as its factorization.

21519083 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 21519083 is about 4638.8665641512. The cubic root of 21519083 is about 278.1471324053.

The spelling of 21519083 in words is "twenty-one million, five hundred nineteen thousand, eighty-three".