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1022100005 = 5204420001
BaseRepresentation
bin111100111011000…
…000001000100101
32122020021001121202
4330323000020211
54043124200010
6245231052245
734220464253
oct7473001045
92566231552
101022100005
11484a48953
12246371085
131339a7404
1499a615d3
155eae96a5
hex3cec0225

1022100005 has 4 divisors (see below), whose sum is σ = 1226520012. Its totient is φ = 817680000.

The previous prime is 1022099999. The next prime is 1022100007. The reversal of 1022100005 is 5000012201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5000012201 = 13913359377.

It can be written as a sum of positive squares in 2 ways, for example, as 107702884 + 914397121 = 10378^2 + 30239^2 .

It is not a de Polignac number, because 1022100005 - 212 = 1022095909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022100007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102209996 + ... + 102210005.

It is an arithmetic number, because the mean of its divisors is an integer number (306630003).

Almost surely, 21022100005 is an apocalyptic number.

It is an amenable number.

1022100005 is a deficient number, since it is larger than the sum of its proper divisors (204420007).

1022100005 is an equidigital number, since it uses as much as digits as its factorization.

1022100005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204420006.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 1022100005 is about 31970.2987943497. The cubic root of 1022100005 is about 1007.3130571589.

Adding to 1022100005 its reverse (5000012201), we get a palindrome (6022112206).

The spelling of 1022100005 in words is "one billion, twenty-two million, one hundred thousand, five".

Divisors: 1 5 204420001 1022100005