214431431 has 4 divisors (see below), whose sum is σ = 217451664. Its totient is φ = 211411200.

The previous prime is 214431389. The next prime is 214431479. The reversal of 214431431 is 134134412.

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 214431431 - 2⁶ = 214431367 is a prime.

It is a super-2 number, since 2×214431431² = 91961677201415522, 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 = 214431397 and 214431406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214431491) 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, 1510010 + ... + 1510151.

It is an arithmetic number, because the mean of its divisors is an integer number (54362916).

Almost surely, 2^214431431 is an apocalyptic number.

214431431 is a deficient number, since it is larger than the sum of its proper divisors (3020233).

214431431 is an equidigital number, since it uses as much as digits as its factorization.

214431431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3020232.

The product of its digits is 1152, while the sum is 23.

The square root of 214431431 is about 14643.4774217055. The cubic root of 214431431 is about 598.5440913705.

Adding to 214431431 its reverse (134134412), we get a palindrome (348565843).

The spelling of 214431431 in words is "two hundred fourteen million, four hundred thirty-one thousand, four hundred thirty-one".