42536231 has 4 divisors (see below), whose sum is σ = 44775000. Its totient is φ = 40297464.

The previous prime is 42536213. The next prime is 42536233. The reversal of 42536231 is 13263524.

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-42536231 is a prime.

It is a super-2 number, since 2×42536231² = 3618661895370722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42536231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42536233) 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 3 ways as a sum of consecutive naturals, for example, 1119356 + ... + 1119393.

It is an arithmetic number, because the mean of its divisors is an integer number (11193750).

Almost surely, 2^42536231 is an apocalyptic number.

42536231 is a deficient number, since it is larger than the sum of its proper divisors (2238769).

42536231 is a wasteful number, since it uses less digits than its factorization.

42536231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2238768.

The product of its digits is 4320, while the sum is 26.

The square root of 42536231 is about 6521.9806040803. The cubic root of 42536231 is about 349.0757410126.

Adding to 42536231 its reverse (13263524), we get a palindrome (55799755).

The spelling of 42536231 in words is "forty-two million, five hundred thirty-six thousand, two hundred thirty-one".