42917631 has 4 divisors (see below), whose sum is σ = 57223512. Its totient is φ = 28611752.

The previous prime is 42917629. The next prime is 42917647. The reversal of 42917631 is 13671924.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42917631 - 2¹ = 42917629 is a prime.

It is a super-2 number, since 2×42917631² = 3683846101304322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42917592 and 42917601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42917681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7152936 + ... + 7152941.

It is an arithmetic number, because the mean of its divisors is an integer number (14305878).

Almost surely, 2^42917631 is an apocalyptic number.

42917631 is a deficient number, since it is larger than the sum of its proper divisors (14305881).

42917631 is a wasteful number, since it uses less digits than its factorization.

42917631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14305880.

The product of its digits is 9072, while the sum is 33.

The square root of 42917631 is about 6551.1549363452. The cubic root of 42917631 is about 350.1159642948.

The spelling of 42917631 in words is "forty-two million, nine hundred seventeen thousand, six hundred thirty-one".