Search a number
BaseRepresentation
bin1001101001101101110000…
…00100101110011111000000
32210011001012101222211012011
410310312320010232133000
510240220310021000011
6113050224410542304
74320264301250062
oct464667004563700
983131171884164
1021224521656256
1168432a6175446
122469555437994
13bac604c930c9
145353b53b3732
1526c172757621
hex134db812e7c0

21224521656256 has 28 divisors (see below), whose sum is σ = 42710613130800. Its totient is φ = 10462792363520.

The previous prime is 21224521656199. The next prime is 21224521656311. The reversal of 21224521656256 is 65265612542212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2335440181 + ... + 2335449268.

Almost surely, 221224521656256 is an apocalyptic number.

It is an amenable number.

21224521656256 is an abundant number, since it is smaller than the sum of its proper divisors (21486091474544).

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

21224521656256 is an equidigital number, since it uses as much as digits as its factorization.

21224521656256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4670889532 (or 4670889522 counting only the distinct ones).

The product of its digits is 3456000, while the sum is 49.

The spelling of 21224521656256 in words is "twenty-one trillion, two hundred twenty-four billion, five hundred twenty-one million, six hundred fifty-six thousand, two hundred fifty-six".