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22201001 is a prime number
BaseRepresentation
bin101010010110…
…0001010101001
31112202221001022
41110230022221
521140413001
62111502225
7356463644
oct124541251
945687038
1022201001
1111593a39
127527975
1347a41b4
142d3ca5b
151e3811b
hex152c2a9

22201001 has 2 divisors, whose sum is σ = 22201002. Its totient is φ = 22201000.

The previous prime is 22200947. The next prime is 22201019. The reversal of 22201001 is 10010222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20241001 + 1960000 = 4499^2 + 1400^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-22201001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22201001.

It is not a weakly prime, because it can be changed into another prime (22201801) 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 as a sum of consecutive naturals, namely, 11100500 + 11100501.

It is an arithmetic number, because the mean of its divisors is an integer number (11100501).

Almost surely, 222201001 is an apocalyptic number.

It is an amenable number.

22201001 is a deficient number, since it is larger than the sum of its proper divisors (1).

22201001 is an equidigital number, since it uses as much as digits as its factorization.

22201001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 22201001 is about 4711.7938197676. The cubic root of 22201001 is about 281.0546999047.

Adding to 22201001 its reverse (10010222), we get a palindrome (32211223).

The spelling of 22201001 in words is "twenty-two million, two hundred one thousand, one".