221675887 has 2 divisors, whose sum is σ = 221675888. Its totient is φ = 221675886.

The previous prime is 221675849. The next prime is 221675939. The reversal of 221675887 is 788576122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221675887 - 2¹⁵ = 221643119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221675837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110837943 + 110837944.

It is an arithmetic number, because the mean of its divisors is an integer number (110837944).

Almost surely, 2^221675887 is an apocalyptic number.

221675887 is a deficient number, since it is larger than the sum of its proper divisors (1).

221675887 is an equidigital number, since it uses as much as digits as its factorization.

221675887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 376320, while the sum is 46.

The square root of 221675887 is about 14888.7839328805. The cubic root of 221675887 is about 605.2100784458.

The spelling of 221675887 in words is "two hundred twenty-one million, six hundred seventy-five thousand, eight hundred eighty-seven".