42543311 has 4 divisors (see below), whose sum is σ = 42593472. Its totient is φ = 42493152.

The previous prime is 42543301. The next prime is 42543341. The reversal of 42543311 is 11334524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42543311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42543301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23786 + ... + 25511.

It is an arithmetic number, because the mean of its divisors is an integer number (10648368).

Almost surely, 2^42543311 is an apocalyptic number.

42543311 is a deficient number, since it is larger than the sum of its proper divisors (50161).

42543311 is an equidigital number, since it uses as much as digits as its factorization.

42543311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50160.

The product of its digits is 1440, while the sum is 23.

The square root of 42543311 is about 6522.5233613993. The cubic root of 42543311 is about 349.0951073981.

Adding to 42543311 its reverse (11334524), we get a palindrome (53877835).

The spelling of 42543311 in words is "forty-two million, five hundred forty-three thousand, three hundred eleven".