214391931 has 8 divisors (see below), whose sum is σ = 307844880. Its totient is φ = 131933472.

The previous prime is 214391923. The next prime is 214391987. The reversal of 214391931 is 139193412.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 214391931 - 2³ = 214391923 is a prime.

It is a super-2 number, since 2×214391931² = 91927800155817522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 214391892 and 214391901.

It is not an unprimeable number, because it can be changed into a prime (214390931) 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 7 ways as a sum of consecutive naturals, for example, 2748576 + ... + 2748653.

It is an arithmetic number, because the mean of its divisors is an integer number (38480610).

Almost surely, 2^214391931 is an apocalyptic number.

214391931 is a deficient number, since it is larger than the sum of its proper divisors (93452949).

214391931 is a wasteful number, since it uses less digits than its factorization.

214391931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5497245.

The product of its digits is 5832, while the sum is 33.

The square root of 214391931 is about 14642.1286362332. The cubic root of 214391931 is about 598.5073368964.

The spelling of 214391931 in words is "two hundred fourteen million, three hundred ninety-one thousand, nine hundred thirty-one".