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12221983 = 19961417
BaseRepresentation
bin101110100111…
…111000011111
3211222221102001
4232213320133
511112100413
61113543131
7205612414
oct56477037
924887361
1012221983
116998614
124114aa7
1326bc057
1418a210b
1511164dd
hexba7e1f

12221983 has 4 divisors (see below), whose sum is σ = 12283600. Its totient is φ = 12160368.

The previous prime is 12221981. The next prime is 12222013. The reversal of 12221983 is 38912221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38912221 = 170922769.

It is a cyclic number.

It is not a de Polignac number, because 12221983 - 21 = 12221981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30510 + ... + 30907.

It is an arithmetic number, because the mean of its divisors is an integer number (3070900).

Almost surely, 212221983 is an apocalyptic number.

12221983 is a deficient number, since it is larger than the sum of its proper divisors (61617).

12221983 is an equidigital number, since it uses as much as digits as its factorization.

12221983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61616.

The product of its digits is 1728, while the sum is 28.

The square root of 12221983 is about 3495.9952803172. The cubic root of 12221983 is about 230.3459381480.

The spelling of 12221983 in words is "twelve million, two hundred twenty-one thousand, nine hundred eighty-three".

Divisors: 1 199 61417 12221983