214405643 has 6 divisors (see below), whose sum is σ = 215278284. Its totient is φ = 213536504.

The previous prime is 214405619. The next prime is 214405651. The reversal of 214405643 is 346504412.

It is not a de Polignac number, because 214405643 - 2¹² = 214401547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (214405603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70880 + ... + 73842.

It is an arithmetic number, because the mean of its divisors is an integer number (35879714).

Almost surely, 2^214405643 is an apocalyptic number.

214405643 is a deficient number, since it is larger than the sum of its proper divisors (872641).

214405643 is an frugal number, since it uses more digits than its factorization.

214405643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3501 (or 3232 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 214405643 is about 14642.5968666763. The cubic root of 214405643 is about 598.5200963281.

The spelling of 214405643 in words is "two hundred fourteen million, four hundred five thousand, six hundred forty-three".