42100631 has 2 divisors, whose sum is σ = 42100632. Its totient is φ = 42100630.

The previous prime is 42100613. The next prime is 42100661. The reversal of 42100631 is 13600124.

42100631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (42100613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42100631 - 2¹⁴ = 42084247 is a prime.

It is a super-2 number, since 2×42100631² = 3544926261196322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42100661) 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, 21050315 + 21050316.

It is an arithmetic number, because the mean of its divisors is an integer number (21050316).

Almost surely, 2^42100631 is an apocalyptic number.

42100631 is a deficient number, since it is larger than the sum of its proper divisors (1).

42100631 is an equidigital number, since it uses as much as digits as its factorization.

42100631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 42100631 is about 6488.4999036757. The cubic root of 42100631 is about 347.8800589656.

Adding to 42100631 its reverse (13600124), we get a palindrome (55700755).

The spelling of 42100631 in words is "forty-two million, one hundred thousand, six hundred thirty-one".