42253543 has 2 divisors, whose sum is σ = 42253544. Its totient is φ = 42253542.

The previous prime is 42253537. The next prime is 42253579. The reversal of 42253543 is 34535224.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42253543 - 2¹³ = 42245351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42253943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21126771 + 21126772.

It is an arithmetic number, because the mean of its divisors is an integer number (21126772).

Almost surely, 2^42253543 is an apocalyptic number.

42253543 is a deficient number, since it is larger than the sum of its proper divisors (1).

42253543 is an equidigital number, since it uses as much as digits as its factorization.

42253543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 28.

The square root of 42253543 is about 6500.2725327481. The cubic root of 42253543 is about 348.3007237825.

Adding to 42253543 its reverse (34535224), we get a palindrome (76788767).

The spelling of 42253543 in words is "forty-two million, two hundred fifty-three thousand, five hundred forty-three".