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21143022 = 2317320369
BaseRepresentation
bin101000010100…
…1110111101110
31110210011202220
41100221313232
520403034042
62033100210
7344466315
oct120516756
943704686
1021143022
1110a3107a
1270b7666
1344c3784
142b4527c
151cc98ec
hex1429dee

21143022 has 16 divisors (see below), whose sum is σ = 42532560. Its totient is φ = 7006592.

The previous prime is 21143009. The next prime is 21143039. The reversal of 21143022 is 22034112.

It is a junction number, because it is equal to n+sod(n) for n = 21142992 and 21143010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9147 + ... + 11222.

It is an arithmetic number, because the mean of its divisors is an integer number (2658285).

Almost surely, 221143022 is an apocalyptic number.

21143022 is an abundant number, since it is smaller than the sum of its proper divisors (21389538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21143022 is a wasteful number, since it uses less digits than its factorization.

21143022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20547.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 21143022 is about 4598.1541948917. The cubic root of 21143022 is about 276.5173294481.

Adding to 21143022 its reverse (22034112), we get a palindrome (43177134).

The spelling of 21143022 in words is "twenty-one million, one hundred forty-three thousand, twenty-two".

Divisors: 1 2 3 6 173 346 519 1038 20369 40738 61107 122214 3523837 7047674 10571511 21143022