42217908631 has 4 divisors (see below), whose sum is σ = 42219324792. Its totient is φ = 42216492472.

The previous prime is 42217908617. The next prime is 42217908659. The reversal of 42217908631 is 13680971224.

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 42217908631 - 2⁹ = 42217908119 is a prime.

It is a super-2 number, since 2×42217908631² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42217908671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 662380 + ... + 723313.

It is an arithmetic number, because the mean of its divisors is an integer number (10554831198).

Almost surely, 2^42217908631 is an apocalyptic number.

42217908631 is a deficient number, since it is larger than the sum of its proper divisors (1416161).

42217908631 is a wasteful number, since it uses less digits than its factorization.

42217908631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1416160.

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 42217908631 in words is "forty-two billion, two hundred seventeen million, nine hundred eight thousand, six hundred thirty-one".