42636031 has 2 divisors, whose sum is σ = 42636032. Its totient is φ = 42636030.

The previous prime is 42636029. The next prime is 42636071. The reversal of 42636031 is 13063624.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42636031 - 2¹ = 42636029 is a prime.

It is a super-2 number, since 2×42636031² = 3635662278865922, which contains 22 as substring.

Together with 42636029, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 42635987 and 42636005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42636001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21318015 + 21318016.

It is an arithmetic number, because the mean of its divisors is an integer number (21318016).

Almost surely, 2^42636031 is an apocalyptic number.

42636031 is a deficient number, since it is larger than the sum of its proper divisors (1).

42636031 is an equidigital number, since it uses as much as digits as its factorization.

42636031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 42636031 is about 6529.6271715926. The cubic root of 42636031 is about 349.3485323698.

Adding to 42636031 its reverse (13063624), we get a palindrome (55699655).

The spelling of 42636031 in words is "forty-two million, six hundred thirty-six thousand, thirty-one".