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23043421 = 61377761
BaseRepresentation
bin101011111100…
…1110101011101
31121100201122001
41113321311131
521344342141
62141522301
7366602662
oct127716535
947321561
1023043421
1112009955
127873391
134a0a77b
1430bba69
152052a31
hex15f9d5d

23043421 has 4 divisors (see below), whose sum is σ = 23421244. Its totient is φ = 22665600.

The previous prime is 23043407. The next prime is 23043437. The reversal of 23043421 is 12434032.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 290521 + 22752900 = 539^2 + 4770^2 .

It is a cyclic number.

It is not a de Polignac number, because 23043421 - 25 = 23043389 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 (23043481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188820 + ... + 188941.

It is an arithmetic number, because the mean of its divisors is an integer number (5855311).

Almost surely, 223043421 is an apocalyptic number.

It is an amenable number.

23043421 is a deficient number, since it is larger than the sum of its proper divisors (377823).

23043421 is an equidigital number, since it uses as much as digits as its factorization.

23043421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377822.

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

The square root of 23043421 is about 4800.3563409397. The cubic root of 23043421 is about 284.5655471483.

Adding to 23043421 its reverse (12434032), we get a palindrome (35477453).

The spelling of 23043421 in words is "twenty-three million, forty-three thousand, four hundred twenty-one".

Divisors: 1 61 377761 23043421