42317631 has 24 divisors (see below), whose sum is σ = 64527840. Its totient is φ = 26670336.

The previous prime is 42317593. The next prime is 42317651. The reversal of 42317631 is 13671324.

42317631 is a `hidden beast` number, since 4 + 23 + 1 + 7 + 631 = 666.

It is not a de Polignac number, because 42317631 - 2¹⁰ = 42316607 is a prime.

It is a super-2 number, since 2×42317631² = 3581563786904322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42317595 and 42317604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42317651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17275 + ... + 19571.

It is an arithmetic number, because the mean of its divisors is an integer number (2688660).

Almost surely, 2^42317631 is an apocalyptic number.

42317631 is a deficient number, since it is larger than the sum of its proper divisors (22210209).

42317631 is a wasteful number, since it uses less digits than its factorization.

42317631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2415 (or 2412 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 42317631 is about 6505.2003043719. The cubic root of 42317631 is about 348.4767296993.

Adding to 42317631 its reverse (13671324), we get a palindrome (55988955).

The spelling of 42317631 in words is "forty-two million, three hundred seventeen thousand, six hundred thirty-one".