42443631 has 6 divisors (see below), whose sum is σ = 61307480. Its totient is φ = 28295748.

The previous prime is 42443603. The next prime is 42443633. The reversal of 42443631 is 13634424.

42443631 is a `hidden beast` number, since 4 + 24 + 4 + 3 + 631 = 666.

It is not a de Polignac number, because 42443631 - 2⁶ = 42443567 is a prime.

It is a super-2 number, since 2×42443631² = 3602923624928322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42443595 and 42443604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42443633) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2357971 + ... + 2357988.

Almost surely, 2^42443631 is an apocalyptic number.

42443631 is a deficient number, since it is larger than the sum of its proper divisors (18863849).

42443631 is a wasteful number, since it uses less digits than its factorization.

42443631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4715965 (or 4715962 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

The square root of 42443631 is about 6514.8776657739. The cubic root of 42443631 is about 348.8222481066.

It can be divided in two parts, 4244 and 3631, that added together give a triangular number (7875 = T₁₂₅).

The spelling of 42443631 in words is "forty-two million, four hundred forty-three thousand, six hundred thirty-one".