211901138 has 8 divisors (see below), whose sum is σ = 318075120. Its totient is φ = 105876100.

The previous prime is 211901113. The next prime is 211901149. The reversal of 211901138 is 831109112.

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

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 3 ways as a sum of consecutive naturals, for example, 33608 + ... + 39411.

It is an arithmetic number, because the mean of its divisors is an integer number (39759390).

Almost surely, 2^211901138 is an apocalyptic number.

211901138 is a deficient number, since it is larger than the sum of its proper divisors (106173982).

211901138 is a wasteful number, since it uses less digits than its factorization.

211901138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74472.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 211901138 is about 14556.8244476603. The cubic root of 211901138 is about 596.1804946325.

The spelling of 211901138 in words is "two hundred eleven million, nine hundred one thousand, one hundred thirty-eight".