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220211001 = 3315154013
BaseRepresentation
bin11010010000000…
…10011100111001
3120100100212201000
431020002130321
5422333223001
633503515213
75312522403
oct1510023471
9510325630
10220211001
1110333786a
12618b8b09
133681278a
1421363b73
15144eca86
hexd202739

220211001 has 16 divisors (see below), whose sum is σ = 328405120. Its totient is φ = 145832400.

The previous prime is 220210987. The next prime is 220211003. The reversal of 220211001 is 100112022.

It is not a de Polignac number, because 220211001 - 26 = 220210937 is a prime.

It is a super-2 number, since 2×2202110012 = 96985769922844002, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220211003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22930 + ... + 31083.

It is an arithmetic number, because the mean of its divisors is an integer number (20525320).

Almost surely, 2220211001 is an apocalyptic number.

It is an amenable number.

220211001 is a deficient number, since it is larger than the sum of its proper divisors (108194119).

220211001 is a wasteful number, since it uses less digits than its factorization.

220211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54173 (or 54167 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 220211001 is about 14839.5081117940. The cubic root of 220211001 is about 603.8740079367.

Adding to 220211001 its reverse (100112022), we get a palindrome (320323023).

It can be divided in two parts, 2202 and 11001, that added together give a triangular number (13203 = T162).

The spelling of 220211001 in words is "two hundred twenty million, two hundred eleven thousand, one".

Divisors: 1 3 9 27 151 453 1359 4077 54013 162039 486117 1458351 8155963 24467889 73403667 220211001