21875467 has 2 divisors, whose sum is σ = 21875468. Its totient is φ = 21875466.

The previous prime is 21875453. The next prime is 21875527. The reversal of 21875467 is 76457812.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21875467 - 2⁷ = 21875339 is a prime.

It is not a weakly prime, because it can be changed into another prime (21875437) 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, 10937733 + 10937734.

It is an arithmetic number, because the mean of its divisors is an integer number (10937734).

Almost surely, 2^21875467 is an apocalyptic number.

21875467 is a deficient number, since it is larger than the sum of its proper divisors (1).

21875467 is an equidigital number, since it uses as much as digits as its factorization.

21875467 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94080, while the sum is 40.

The square root of 21875467 is about 4677.1216576010. The cubic root of 21875467 is about 279.6742257071.

The spelling of 21875467 in words is "twenty-one million, eight hundred seventy-five thousand, four hundred sixty-seven".