431081 has 4 divisors (see below), whose sum is σ = 492672. Its totient is φ = 369492.

The previous prime is 431077. The next prime is 431083. The reversal of 431081 is 180134.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 180134 = 2 ⋅90067.

It is a cyclic number.

It is not a de Polignac number, because 431081 - 2² = 431077 is a prime.

It is a super-2 number, since 2×431081² = 371661657122, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (431083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30785 + ... + 30798.

It is an arithmetic number, because the mean of its divisors is an integer number (123168).

2⁴³¹⁰⁸¹ is an apocalyptic number.

It is an amenable number.

431081 is a deficient number, since it is larger than the sum of its proper divisors (61591).

431081 is an equidigital number, since it uses as much as digits as its factorization.

431081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61590.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 431081 is about 656.5675898184. The cubic root of 431081 is about 75.5416199629.

The spelling of 431081 in words is "four hundred thirty-one thousand, eighty-one".