22001387 has 2 divisors, whose sum is σ = 22001388. Its totient is φ = 22001386.

The previous prime is 22001381. The next prime is 22001467. The reversal of 22001387 is 78310022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22001387 - 2²⁴ = 5224171 is a prime.

It is a super-2 number, since 2×22001387² = 968122059847538, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22001381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11000693 + 11000694.

It is an arithmetic number, because the mean of its divisors is an integer number (11000694).

Almost surely, 2^22001387 is an apocalyptic number.

22001387 is a deficient number, since it is larger than the sum of its proper divisors (1).

22001387 is an equidigital number, since it uses as much as digits as its factorization.

22001387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 22001387 is about 4690.5636121899. The cubic root of 22001387 is about 280.2098214699.

The spelling of 22001387 in words is "twenty-two million, one thousand, three hundred eighty-seven".