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23223421 = 1311315809
BaseRepresentation
bin101100010010…
…1110001111101
31121200212112201
41120211301331
521421122141
62145431501
7401252524
oct130456175
947625481
1023223421
1112122111
12793b591
134a71690
1431274bb
15208b031
hex1625c7d

23223421 has 8 divisors (see below), whose sum is σ = 25232760. Its totient is φ = 21245952.

The previous prime is 23223401. The next prime is 23223439. The reversal of 23223421 is 12432232.

It can be written as a sum of positive squares in 4 ways, for example, as 3960100 + 19263321 = 1990^2 + 4389^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23223421 - 29 = 23222909 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 (23223401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6436 + ... + 9373.

It is an arithmetic number, because the mean of its divisors is an integer number (3154095).

Almost surely, 223223421 is an apocalyptic number.

It is an amenable number.

23223421 is a deficient number, since it is larger than the sum of its proper divisors (2009339).

23223421 is a wasteful number, since it uses less digits than its factorization.

23223421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15935.

The product of its digits is 576, while the sum is 19.

The square root of 23223421 is about 4819.0684784510. The cubic root of 23223421 is about 285.3045723126.

Adding to 23223421 its reverse (12432232), we get a palindrome (35655653).

It can be divided in two parts, 232 and 23421, that added together give a triangular number (23653 = T217).

The spelling of 23223421 in words is "twenty-three million, two hundred twenty-three thousand, four hundred twenty-one".

Divisors: 1 13 113 1469 15809 205517 1786417 23223421