42553213 has 2 divisors, whose sum is σ = 42553214. Its totient is φ = 42553212.

The previous prime is 42553207. The next prime is 42553249. The reversal of 42553213 is 31235524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29398084 + 13155129 = 5422^2 + 3627^2 .

It is a cyclic number.

It is not a de Polignac number, because 42553213 - 2¹⁷ = 42422141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42553513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21276606 + 21276607.

It is an arithmetic number, because the mean of its divisors is an integer number (21276607).

Almost surely, 2^42553213 is an apocalyptic number.

It is an amenable number.

42553213 is a deficient number, since it is larger than the sum of its proper divisors (1).

42553213 is an equidigital number, since it uses as much as digits as its factorization.

42553213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 25.

The square root of 42553213 is about 6523.2823792934. The cubic root of 42553213 is about 349.1221893805.

Adding to 42553213 its reverse (31235524), we get a palindrome (73788737).

The spelling of 42553213 in words is "forty-two million, five hundred fifty-three thousand, two hundred thirteen".