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223442423 = 1831122033
BaseRepresentation
bin11010101000101…
…11010111110111
3120120110001101022
431110113113313
5424200124143
634101051355
75352141431
oct1524272767
9516401338
10223442423
11105144666
12629b6b5b
13373a4569
1421965651
151493a268
hexd5175f7

223442423 has 4 divisors (see below), whose sum is σ = 223566288. Its totient is φ = 223318560.

The previous prime is 223442393. The next prime is 223442437. The reversal of 223442423 is 324244322.

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: 324244322 = 2162122161.

It is a cyclic number.

It is not a de Polignac number, because 223442423 - 222 = 219248119 is a prime.

It is a super-2 number, since 2×2234424232 = 99853032792221858, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 223442392 and 223442401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223442473) 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, 59186 + ... + 62847.

It is an arithmetic number, because the mean of its divisors is an integer number (55891572).

Almost surely, 2223442423 is an apocalyptic number.

223442423 is a deficient number, since it is larger than the sum of its proper divisors (123865).

223442423 is a wasteful number, since it uses less digits than its factorization.

223442423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123864.

The product of its digits is 9216, while the sum is 26.

The square root of 223442423 is about 14947.9906007463. The cubic root of 223442423 is about 606.8134673056.

Adding to 223442423 its reverse (324244322), we get a palindrome (547686745).

The spelling of 223442423 in words is "two hundred twenty-three million, four hundred forty-two thousand, four hundred twenty-three".

Divisors: 1 1831 122033 223442423