214632991 has 8 divisors (see below), whose sum is σ = 221818464. Its totient is φ = 207540480.

The previous prime is 214632947. The next prime is 214633039. The reversal of 214632991 is 199236412.

214632991 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 not a de Polignac number, because 214632991 - 2⁷ = 214632863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 214632991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214632931) 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, 18531 + ... + 27796.

It is an arithmetic number, because the mean of its divisors is an integer number (27727308).

Almost surely, 2^214632991 is an apocalyptic number.

214632991 is the 9266-th heptagonal number.

214632991 is a deficient number, since it is larger than the sum of its proper divisors (7185473).

214632991 is a wasteful number, since it uses less digits than its factorization.

214632991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46481.

The product of its digits is 23328, while the sum is 37.

The square root of 214632991 is about 14650.3580502321. The cubic root of 214632991 is about 598.7315712966.

The spelling of 214632991 in words is "two hundred fourteen million, six hundred thirty-two thousand, nine hundred ninety-one".