42103631 has 2 divisors, whose sum is σ = 42103632. Its totient is φ = 42103630.

The previous prime is 42103627. The next prime is 42103637. The reversal of 42103631 is 13630124.

42103631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42103631 - 2² = 42103627 is a prime.

It is a super-2 number, since 2×42103631² = 3545431486768322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42103637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21051815 + 21051816.

It is an arithmetic number, because the mean of its divisors is an integer number (21051816).

Almost surely, 2^42103631 is an apocalyptic number.

42103631 is a deficient number, since it is larger than the sum of its proper divisors (1).

42103631 is an equidigital number, since it uses as much as digits as its factorization.

42103631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 42103631 is about 6488.7310777994. The cubic root of 42103631 is about 347.8883218298. Note that the first 3 decimals are identical.

Adding to 42103631 its reverse (13630124), we get a palindrome (55733755).

The spelling of 42103631 in words is "forty-two million, one hundred three thousand, six hundred thirty-one".