420732233 has 2 divisors, whose sum is σ = 420732234. Its totient is φ = 420732232.

The previous prime is 420732199. The next prime is 420732241. The reversal of 420732233 is 332237024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 233233984 + 187498249 = 15272^2 + 13693^2 .

It is a cyclic number.

It is not a de Polignac number, because 420732233 - 2¹⁰ = 420731209 is a prime.

It is a super-2 number, since 2×420732233² = 354031223770332578, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_22381442 and since 420732233 and 22381442 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 (420732833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210366116 + 210366117.

It is an arithmetic number, because the mean of its divisors is an integer number (210366117).

Almost surely, 2^420732233 is an apocalyptic number.

It is an amenable number.

420732233 is a deficient number, since it is larger than the sum of its proper divisors (1).

420732233 is an equidigital number, since it uses as much as digits as its factorization.

420732233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 26.

The square root of 420732233 is about 20511.7584082886. The cubic root of 420732233 is about 749.3221923610.

Adding to 420732233 its reverse (332237024), we get a palindrome (752969257).

The spelling of 420732233 in words is "four hundred twenty million, seven hundred thirty-two thousand, two hundred thirty-three".