21875383 has 2 divisors, whose sum is σ = 21875384. Its totient is φ = 21875382.

The previous prime is 21875377. The next prime is 21875387. The reversal of 21875383 is 38357812.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21875383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21875387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10937691 + 10937692.

It is an arithmetic number, because the mean of its divisors is an integer number (10937692).

Almost surely, 2^21875383 is an apocalyptic number.

21875383 is a deficient number, since it is larger than the sum of its proper divisors (1).

21875383 is an equidigital number, since it uses as much as digits as its factorization.

21875383 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 37.

The square root of 21875383 is about 4677.1126777105. The cubic root of 21875383 is about 279.6738677313.

The spelling of 21875383 in words is "twenty-one million, eight hundred seventy-five thousand, three hundred eighty-three".