42285517731 has 24 divisors (see below), whose sum is σ = 62943570144. Its totient is φ = 27338048640.

The previous prime is 42285517723. The next prime is 42285517739. The reversal of 42285517731 is 13771558224.

42285517731 is a `hidden beast` number, since 4 + 2 + 28 + 551 + 7 + 73 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (42285517723) and next prime (42285517739).

It is not a de Polignac number, because 42285517731 - 2³ = 42285517723 is a prime.

It is a super-2 number, since 2×42285517731² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42285517739) 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 23 ways as a sum of consecutive naturals, for example, 281476 + ... + 404721.

It is an arithmetic number, because the mean of its divisors is an integer number (2622648756).

Almost surely, 2^42285517731 is an apocalyptic number.

42285517731 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

42285517731 is a deficient number, since it is larger than the sum of its proper divisors (20658052413).

42285517731 is a wasteful number, since it uses less digits than its factorization.

42285517731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686411 (or 686408 counting only the distinct ones).

The product of its digits is 470400, while the sum is 45.

The spelling of 42285517731 in words is "forty-two billion, two hundred eighty-five million, five hundred seventeen thousand, seven hundred thirty-one".