42513233 has 6 divisors (see below), whose sum is σ = 49454226. Its totient is φ = 36439872.

The previous prime is 42513227. The next prime is 42513281. The reversal of 42513233 is 33231524.

It can be written as a sum of positive squares in only one way, i.e., 41113744 + 1399489 = 6412^2 + 1183^2 .

It is not a de Polignac number, because 42513233 - 2⁶ = 42513169 is a prime.

It is a super-2 number, since 2×42513233² = 3614749960224578, 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 = 42513199 and 42513208.

It is not an unprimeable number, because it can be changed into a prime (42513533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 433760 + ... + 433857.

It is an arithmetic number, because the mean of its divisors is an integer number (8242371).

Almost surely, 2^42513233 is an apocalyptic number.

It is an amenable number.

42513233 is a deficient number, since it is larger than the sum of its proper divisors (6940993).

42513233 is an equidigital number, since it uses as much as digits as its factorization.

42513233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867631 (or 867624 counting only the distinct ones).

The product of its digits is 2160, while the sum is 23.

The square root of 42513233 is about 6520.2172509817. The cubic root of 42513233 is about 349.0128182526.

Adding to 42513233 its reverse (33231524), we get a palindrome (75744757).

The spelling of 42513233 in words is "forty-two million, five hundred thirteen thousand, two hundred thirty-three".