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21321322 = 21123291453
BaseRepresentation
bin101000101010…
…1011001101010
31111010020100121
41101111121222
520424240242
62040553454
7346141201
oct121253152
944106317
1021321322
1111043030
12718288a
134556989
142b90238
151d12667
hex145566a

21321322 has 32 divisors (see below), whose sum is σ = 37687680. Its totient is φ = 8944320.

The previous prime is 21321301. The next prime is 21321331. The reversal of 21321322 is 22312312.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 21321296 and 21321305.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13948 + ... + 15400.

It is an arithmetic number, because the mean of its divisors is an integer number (1177740).

Almost surely, 221321322 is an apocalyptic number.

21321322 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21321322 is a deficient number, since it is larger than the sum of its proper divisors (16366358).

21321322 is a wasteful number, since it uses less digits than its factorization.

21321322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1518.

The product of its digits is 144, while the sum is 16.

The square root of 21321322 is about 4617.5017054680. The cubic root of 21321322 is about 277.2924487597.

Adding to 21321322 its reverse (22312312), we get a palindrome (43633634).

The spelling of 21321322 in words is "twenty-one million, three hundred twenty-one thousand, three hundred twenty-two".

Divisors: 1 2 11 22 23 29 46 58 253 319 506 638 667 1334 1453 2906 7337 14674 15983 31966 33419 42137 66838 84274 367609 463507 735218 927014 969151 1938302 10660661 21321322