431881 has 2 divisors, whose sum is σ = 431882. Its totient is φ = 431880.

The previous prime is 431869. The next prime is 431887. The reversal of 431881 is 188134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 336400 + 95481 = 580^2 + 309^2 .

It is a cyclic number.

It is not a de Polignac number, because 431881 - 2⁹ = 431369 is a prime.

It is a super-2 number, since 2×431881² = 373042396322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (431887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215940 + 215941.

It is an arithmetic number, because the mean of its divisors is an integer number (215941).

2⁴³¹⁸⁸¹ is an apocalyptic number.

It is an amenable number.

431881 is a deficient number, since it is larger than the sum of its proper divisors (1).

431881 is an equidigital number, since it uses as much as digits as its factorization.

431881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 25.

The square root of 431881 is about 657.1765364040. The cubic root of 431881 is about 75.5883211245.

The spelling of 431881 in words is "four hundred thirty-one thousand, eight hundred eighty-one".