42253213 has 2 divisors, whose sum is σ = 42253214. Its totient is φ = 42253212.

The previous prime is 42253199. The next prime is 42253241. The reversal of 42253213 is 31235224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25130169 + 17123044 = 5013^2 + 4138^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42253213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42253613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21126606 + 21126607.

It is an arithmetic number, because the mean of its divisors is an integer number (21126607).

Almost surely, 2^42253213 is an apocalyptic number.

It is an amenable number.

42253213 is a deficient number, since it is larger than the sum of its proper divisors (1).

42253213 is an equidigital number, since it uses as much as digits as its factorization.

42253213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 22.

The square root of 42253213 is about 6500.2471491475. The cubic root of 42253213 is about 348.2998170378.

Adding to 42253213 its reverse (31235224), we get a palindrome (73488437).

It can be divided in two parts, 422 and 53213, that added together give a palindrome (53635).

The spelling of 42253213 in words is "forty-two million, two hundred fifty-three thousand, two hundred thirteen".