221963005 has 12 divisors (see below), whose sum is σ = 292771836. Its totient is φ = 161427200.

The previous prime is 221962981. The next prime is 221963017. The reversal of 221963005 is 500369122.

It can be written as a sum of positive squares in 2 ways, for example, as 74753316 + 147209689 = 8646^2 + 12133^2 .

It is not a de Polignac number, because 221963005 - 2⁹ = 221962493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 182836 + ... + 184045.

It is an arithmetic number, because the mean of its divisors is an integer number (24397653).

Almost surely, 2^221963005 is an apocalyptic number.

It is an amenable number.

221963005 is a deficient number, since it is larger than the sum of its proper divisors (70808831).

221963005 is a wasteful number, since it uses less digits than its factorization.

221963005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366908 (or 366897 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 221963005 is about 14898.4229031129. The cubic root of 221963005 is about 605.4712581676.

The spelling of 221963005 in words is "two hundred twenty-one million, nine hundred sixty-three thousand, five".