214239731 has 8 divisors (see below), whose sum is σ = 223131744. Its totient is φ = 205511040.

The previous prime is 214239709. The next prime is 214239737. The reversal of 214239731 is 137932412.

214239731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-214239731 is a prime.

It is a super-2 number, since 2×214239731² = 91797324677904722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (214239737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38150 + ... + 43403.

It is an arithmetic number, because the mean of its divisors is an integer number (27891468).

Almost surely, 2^214239731 is an apocalyptic number.

214239731 is a deficient number, since it is larger than the sum of its proper divisors (8892013).

214239731 is an equidigital number, since it uses as much as digits as its factorization.

214239731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81661.

The product of its digits is 9072, while the sum is 32.

The square root of 214239731 is about 14636.9303817433. The cubic root of 214239731 is about 598.3656736338.

The spelling of 214239731 in words is "two hundred fourteen million, two hundred thirty-nine thousand, seven hundred thirty-one".