423511441 has 2 divisors, whose sum is σ = 423511442. Its totient is φ = 423511440.

The previous prime is 423511391. The next prime is 423511453. The reversal of 423511441 is 144115324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 416772225 + 6739216 = 20415^2 + 2596^2 .

It is a cyclic number.

It is not a de Polignac number, because 423511441 - 2¹¹ = 423509393 is a prime.

It is equal to p_22521445 and since 423511441 and 22521445 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (423511241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211755720 + 211755721.

It is an arithmetic number, because the mean of its divisors is an integer number (211755721).

Almost surely, 2^423511441 is an apocalyptic number.

It is an amenable number.

423511441 is a deficient number, since it is larger than the sum of its proper divisors (1).

423511441 is an equidigital number, since it uses as much as digits as its factorization.

423511441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 25.

The square root of 423511441 is about 20579.3936013674. The cubic root of 423511441 is about 750.9684916417.

Adding to 423511441 its reverse (144115324), we get a palindrome (567626765).

The spelling of 423511441 in words is "four hundred twenty-three million, five hundred eleven thousand, four hundred forty-one".