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223742 = 2111871
BaseRepresentation
bin110110100111111110
3102100220202
4312213332
524124432
64443502
71621211
oct664776
9370822
10223742
11143112
12a9592
137aabc
145b778
1546462
hex369fe

223742 has 4 divisors (see below), whose sum is σ = 335616. Its totient is φ = 111870.

The previous prime is 223711. The next prime is 223747. The reversal of 223742 is 247322.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 247322 = 2123661.

It is a plaindrome in base 13.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 223742.

It is not an unprimeable number, because it can be changed into a prime (223747) by changing a digit.

223742 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55934 + ... + 55937.

It is an arithmetic number, because the mean of its divisors is an integer number (83904).

2223742 is an apocalyptic number.

223742 is a deficient number, since it is larger than the sum of its proper divisors (111874).

223742 is a wasteful number, since it uses less digits than its factorization.

223742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111873.

The product of its digits is 672, while the sum is 20.

The square root of 223742 is about 473.0137418723. The cubic root of 223742 is about 60.7084538145.

The spelling of 223742 in words is "two hundred twenty-three thousand, seven hundred forty-two", and thus it is an iban number.

Divisors: 1 2 111871 223742