211438245 has 8 divisors (see below), whose sum is σ = 338301216. Its totient is φ = 112767056.

The previous prime is 211438229. The next prime is 211438273. The reversal of 211438245 is 542834112.

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 211438245 - 2⁴ = 211438229 is a prime.

It is a super-2 number, since 2×211438245² = 89412262897360050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7047927 + ... + 7047956.

It is an arithmetic number, because the mean of its divisors is an integer number (42287652).

Almost surely, 2^211438245 is an apocalyptic number.

It is an amenable number.

211438245 is a deficient number, since it is larger than the sum of its proper divisors (126862971).

211438245 is a wasteful number, since it uses less digits than its factorization.

211438245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14095891.

The product of its digits is 7680, while the sum is 30.

The square root of 211438245 is about 14540.9162366063. The cubic root of 211438245 is about 595.7460641037.

The spelling of 211438245 in words is "two hundred eleven million, four hundred thirty-eight thousand, two hundred forty-five".