42531799 has 4 divisors (see below), whose sum is σ = 42555736. Its totient is φ = 42507864.

The previous prime is 42531793. The next prime is 42531809. The reversal of 42531799 is 99713524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42531799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42531793) 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, 9069 + ... + 12934.

It is an arithmetic number, because the mean of its divisors is an integer number (10638934).

Almost surely, 2^42531799 is an apocalyptic number.

42531799 is a deficient number, since it is larger than the sum of its proper divisors (23937).

42531799 is a wasteful number, since it uses less digits than its factorization.

42531799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23936.

The product of its digits is 68040, while the sum is 40.

The square root of 42531799 is about 6521.6408211431. The cubic root of 42531799 is about 349.0636167805.

The spelling of 42531799 in words is "forty-two million, five hundred thirty-one thousand, seven hundred ninety-nine".