42731575 has 6 divisors (see below), whose sum is σ = 52987184. Its totient is φ = 34185240.

The previous prime is 42731573. The next prime is 42731581. The reversal of 42731575 is 57513724.

It is not a de Polignac number, because 42731575 - 2¹ = 42731573 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42731575.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42731573) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 854607 + ... + 854656.

Almost surely, 2^42731575 is an apocalyptic number.

42731575 is a deficient number, since it is larger than the sum of its proper divisors (10255609).

42731575 is a wasteful number, since it uses less digits than its factorization.

42731575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709273 (or 1709268 counting only the distinct ones).

The product of its digits is 29400, while the sum is 34.

The square root of 42731575 is about 6536.9392684956. The cubic root of 42731575 is about 349.6092919025.

The spelling of 42731575 in words is "forty-two million, seven hundred thirty-one thousand, five hundred seventy-five".