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213822781492 = 22173144452669
BaseRepresentation
bin1100011100100011010…
…1001011100000110100
3202102220200021201222111
43013020311023200310
512000402113001432
6242121232140404
721306504440335
oct3071065134064
9672820251874
10213822781492
1182755427561
1235534997704
1317217cbc218
14a4c5c2628c
155866c4d347
hex31c8d4b834

213822781492 has 12 divisors (see below), whose sum is σ = 396201036420. Its totient is φ = 100622485376.

The previous prime is 213822781451. The next prime is 213822781531. The reversal of 213822781492 is 294187228312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 126676199056 + 87146582436 = 355916^2 + 295206^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1572226267 + ... + 1572226402.

It is an arithmetic number, because the mean of its divisors is an integer number (33016753035).

Almost surely, 2213822781492 is an apocalyptic number.

It is an amenable number.

213822781492 is a deficient number, since it is larger than the sum of its proper divisors (182378254928).

213822781492 is a wasteful number, since it uses less digits than its factorization.

213822781492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3144452690 (or 3144452688 counting only the distinct ones).

The product of its digits is 774144, while the sum is 49.

The spelling of 213822781492 in words is "two hundred thirteen billion, eight hundred twenty-two million, seven hundred eighty-one thousand, four hundred ninety-two".

Divisors: 1 2 4 17 34 68 3144452669 6288905338 12577810676 53455695373 106911390746 213822781492