431031 has 4 divisors (see below), whose sum is σ = 574712. Its totient is φ = 287352.

The previous prime is 431029. The next prime is 431047. The reversal of 431031 is 130134.

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

It is not a de Polignac number, because 431031 - 2¹ = 431029 is a prime.

It is a super-2 number, since 2×431031² = 371575445922, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 430998 and 431016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431021) 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, 71836 + ... + 71841.

It is an arithmetic number, because the mean of its divisors is an integer number (143678).

2⁴³¹⁰³¹ is an apocalyptic number.

431031 is a deficient number, since it is larger than the sum of its proper divisors (143681).

431031 is a wasteful number, since it uses less digits than its factorization.

431031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143680.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 431031 is about 656.5295119033. The cubic root of 431031 is about 75.5386992225.

Adding to 431031 its reverse (130134), we get a palindrome (561165).

The spelling of 431031 in words is "four hundred thirty-one thousand, thirty-one".