214646991 has 8 divisors (see below), whose sum is σ = 308211120. Its totient is φ = 132090432.

The previous prime is 214646989. The next prime is 214647011. The reversal of 214646991 is 199646412.

214646991 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 not a de Polignac number, because 214646991 - 2¹ = 214646989 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214646911) 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, 2751846 + ... + 2751923.

It is an arithmetic number, because the mean of its divisors is an integer number (38526390).

Almost surely, 2^214646991 is an apocalyptic number.

214646991 is a deficient number, since it is larger than the sum of its proper divisors (93564129).

214646991 is a wasteful number, since it uses less digits than its factorization.

214646991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5503785.

The product of its digits is 93312, while the sum is 42.

The square root of 214646991 is about 14650.8358464628. The cubic root of 214646991 is about 598.7445889595.

The spelling of 214646991 in words is "two hundred fourteen million, six hundred forty-six thousand, nine hundred ninety-one".