222550001 has 4 divisors (see below), whose sum is σ = 232226112. Its totient is φ = 212873892.

The previous prime is 222549989. The next prime is 222550019. The reversal of 222550001 is 100055222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 100055222 = 2 ⋅50027611.

It is a cyclic number.

It is not a de Polignac number, because 222550001 - 2²⁶ = 155441137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222550051) 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 in 3 ways as a sum of consecutive naturals, for example, 4838021 + ... + 4838066.

It is an arithmetic number, because the mean of its divisors is an integer number (58056528).

Almost surely, 2^222550001 is an apocalyptic number.

It is an amenable number.

222550001 is a deficient number, since it is larger than the sum of its proper divisors (9676111).

222550001 is an equidigital number, since it uses as much as digits as its factorization.

222550001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9676110.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 222550001 is about 14918.1098333536. The cubic root of 222550001 is about 606.0045247586.

The spelling of 222550001 in words is "two hundred twenty-two million, five hundred fifty thousand, one".