221826001 has 2 divisors, whose sum is σ = 221826002. Its totient is φ = 221826000.

The previous prime is 221825983. The next prime is 221826029. The reversal of 221826001 is 100628122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186732225 + 35093776 = 13665^2 + 5924^2 .

It is a cyclic number.

It is not a de Polignac number, because 221826001 - 2⁹ = 221825489 is a prime.

It is not a weakly prime, because it can be changed into another prime (221826061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110913000 + 110913001.

It is an arithmetic number, because the mean of its divisors is an integer number (110913001).

Almost surely, 2^221826001 is an apocalyptic number.

It is an amenable number.

221826001 is a deficient number, since it is larger than the sum of its proper divisors (1).

221826001 is an equidigital number, since it uses as much as digits as its factorization.

221826001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 221826001 is about 14893.8242570537. The cubic root of 221826001 is about 605.3466592401.

The spelling of 221826001 in words is "two hundred twenty-one million, eight hundred twenty-six thousand, one".