42071631 has 8 divisors (see below), whose sum is σ = 64109184. Its totient is φ = 24040920.

The previous prime is 42071597. The next prime is 42071633. The reversal of 42071631 is 13617024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42071631 - 2⁷ = 42071503 is a prime.

It is a super-2 number, since 2×42071631² = 3540044270000322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42071633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1001685 + ... + 1001726.

It is an arithmetic number, because the mean of its divisors is an integer number (8013648).

Almost surely, 2^42071631 is an apocalyptic number.

42071631 is a deficient number, since it is larger than the sum of its proper divisors (22037553).

42071631 is a wasteful number, since it uses less digits than its factorization.

42071631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2003421.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 42071631 is about 6486.2647957048. The cubic root of 42071631 is about 347.8001643672.

Adding to 42071631 its reverse (13617024), we get a palindrome (55688655).

The spelling of 42071631 in words is "forty-two million, seventy-one thousand, six hundred thirty-one".