431400031 has 4 divisors (see below), whose sum is σ = 435847552. Its totient is φ = 426952512.

The previous prime is 431400017. The next prime is 431400071. The reversal of 431400031 is 130004134.

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

It is a cyclic number.

It is not a de Polignac number, because 431400031 - 2⁹ = 431399519 is a prime.

It is a super-2 number, since 2×431400031² = 372211973493601922, 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 = 431399978 and 431400014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431400001) 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 3 ways as a sum of consecutive naturals, for example, 2223615 + ... + 2223808.

It is an arithmetic number, because the mean of its divisors is an integer number (108961888).

Almost surely, 2^431400031 is an apocalyptic number.

431400031 is a deficient number, since it is larger than the sum of its proper divisors (4447521).

431400031 is an equidigital number, since it uses as much as digits as its factorization.

431400031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4447520.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 431400031 is about 20770.1716651548. The cubic root of 431400031 is about 755.6025078145.

Adding to 431400031 its reverse (130004134), we get a palindrome (561404165).

The spelling of 431400031 in words is "four hundred thirty-one million, four hundred thousand, thirty-one".