42563731 has 8 divisors (see below), whose sum is σ = 50759424. Its totient is φ = 34896840.

The previous prime is 42563707. The next prime is 42563783. The reversal of 42563731 is 13736524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42563731 - 2⁹ = 42563219 is a prime.

It is a super-2 number, since 2×42563731² = 3623342393280722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42563693 and 42563702.

It is not an unprimeable number, because it can be changed into a prime (42563831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132025 + ... + 132346.

It is an arithmetic number, because the mean of its divisors is an integer number (6344928).

Almost surely, 2^42563731 is an apocalyptic number.

42563731 is a deficient number, since it is larger than the sum of its proper divisors (8195693).

42563731 is a wasteful number, since it uses less digits than its factorization.

42563731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264401.

The product of its digits is 15120, while the sum is 31.

The square root of 42563731 is about 6524.0885187128. The cubic root of 42563731 is about 349.1509515227.

The spelling of 42563731 in words is "forty-two million, five hundred sixty-three thousand, seven hundred thirty-one".