42831999 has 48 divisors (see below), whose sum is σ = 73545472. Its totient is φ = 23514624.

The previous prime is 42831991. The next prime is 42832007. The reversal of 42831999 is 99913824.

It is an interprime number because it is at equal distance from previous prime (42831991) and next prime (42832007).

It is not a de Polignac number, because 42831999 - 2³ = 42831991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42831991) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 262692 + ... + 262854.

Almost surely, 2^42831999 is an apocalyptic number.

42831999 is a deficient number, since it is larger than the sum of its proper divisors (30713473).

42831999 is a wasteful number, since it uses less digits than its factorization.

42831999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316 (or 313 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 42831999 is about 6544.6160315178. The cubic root of 42831999 is about 349.8829513366.

The spelling of 42831999 in words is "forty-two million, eight hundred thirty-one thousand, nine hundred ninety-nine".