219022001 has 4 divisors (see below), whose sum is σ = 238933104. Its totient is φ = 199110900.

The previous prime is 219021991. The next prime is 219022051. The reversal of 219022001 is 100220912.

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.

It is a cyclic number.

It is not a de Polignac number, because 219022001 - 2¹⁸ = 218759857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (219022051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9955535 + ... + 9955556.

It is an arithmetic number, because the mean of its divisors is an integer number (59733276).

Almost surely, 2^219022001 is an apocalyptic number.

It is an amenable number.

219022001 is a deficient number, since it is larger than the sum of its proper divisors (19911103).

219022001 is a wasteful number, since it uses less digits than its factorization.

219022001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19911102.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 219022001 is about 14799.3919131835. The cubic root of 219022001 is about 602.7852001688.

Adding to 219022001 its reverse (100220912), we get a palindrome (319242913).

The spelling of 219022001 in words is "two hundred nineteen million, twenty-two thousand, one".