42630631 has 2 divisors, whose sum is σ = 42630632. Its totient is φ = 42630630.

The previous prime is 42630629. The next prime is 42630647. The reversal of 42630631 is 13603624.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42630631 - 2¹ = 42630629 is a prime.

It is a super-2 number, since 2×42630631² = 3634741398916322, which contains 22 as substring.

Together with 42630629, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 42630596 and 42630605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42630671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21315315 + 21315316.

It is an arithmetic number, because the mean of its divisors is an integer number (21315316).

Almost surely, 2^42630631 is an apocalyptic number.

42630631 is a deficient number, since it is larger than the sum of its proper divisors (1).

42630631 is an equidigital number, since it uses as much as digits as its factorization.

42630631 is an evil number, because the sum of its binary digits is even.

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

The square root of 42630631 is about 6529.2136586269. The cubic root of 42630631 is about 349.3337830160. Note that the first 3 decimals are identical.

The spelling of 42630631 in words is "forty-two million, six hundred thirty thousand, six hundred thirty-one".