42178631 has 16 divisors (see below), whose sum is σ = 48795648. Its totient is φ = 36093600.

The previous prime is 42178621. The next prime is 42178639. The reversal of 42178631 is 13687124.

It is a cyclic number.

It is not a de Polignac number, because 42178631 - 2⁶ = 42178567 is a prime.

It is a super-2 number, since 2×42178631² = 3558073826068322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42178639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10946 + ... + 14288.

It is an arithmetic number, because the mean of its divisors is an integer number (3049728).

Almost surely, 2^42178631 is an apocalyptic number.

42178631 is a deficient number, since it is larger than the sum of its proper divisors (6617017).

42178631 is a wasteful number, since it uses less digits than its factorization.

42178631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3422.

The product of its digits is 8064, while the sum is 32.

The square root of 42178631 is about 6494.5077565586. The cubic root of 42178631 is about 348.0947659956.

The spelling of 42178631 in words is "forty-two million, one hundred seventy-eight thousand, six hundred thirty-one".