31430043 has 12 divisors (see below), whose sum is σ = 45452160. Its totient is φ = 20928816.

The previous prime is 31430027. The next prime is 31430053. The reversal of 31430043 is 34003413.

It is not a de Polignac number, because 31430043 - 2⁴ = 31430027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31429998 and 31430025.

It is not an unprimeable number, because it can be changed into a prime (31430023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9478 + ... + 12356.

It is an arithmetic number, because the mean of its divisors is an integer number (3787680).

Almost surely, 2^31430043 is an apocalyptic number.

31430043 is a deficient number, since it is larger than the sum of its proper divisors (14022117).

31430043 is a wasteful number, since it uses less digits than its factorization.

31430043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4098 (or 4095 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 31430043 is about 5606.2503511706. The cubic root of 31430043 is about 315.5840110546.

Adding to 31430043 its reverse (34003413), we get a palindrome (65433456).

The spelling of 31430043 in words is "thirty-one million, four hundred thirty thousand, forty-three".