42593731 has 4 divisors (see below), whose sum is σ = 42633864. Its totient is φ = 42553600.

The previous prime is 42593717. The next prime is 42593737. The reversal of 42593731 is 13739524.

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 42593731 - 2¹¹ = 42591683 is a prime.

It is a super-2 number, since 2×42593731² = 3628451841000722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42593737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18430 + ... + 20611.

It is an arithmetic number, because the mean of its divisors is an integer number (10658466).

Almost surely, 2^42593731 is an apocalyptic number.

42593731 is a deficient number, since it is larger than the sum of its proper divisors (40133).

42593731 is a wasteful number, since it uses less digits than its factorization.

42593731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40132.

The product of its digits is 22680, while the sum is 34.

The square root of 42593731 is about 6526.3872854743. The cubic root of 42593731 is about 349.2329624144.

The spelling of 42593731 in words is "forty-two million, five hundred ninety-three thousand, seven hundred thirty-one".