211191742 has 8 divisors (see below), whose sum is σ = 317800656. Its totient is φ = 105258192.

The previous prime is 211191737. The next prime is 211191767. The reversal of 211191742 is 247191112.

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

It is a self number, because there is not a number n which added to its sum of digits gives 211191742.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168058 + ... + 169309.

It is an arithmetic number, because the mean of its divisors is an integer number (39725082).

Almost surely, 2^211191742 is an apocalyptic number.

211191742 is a deficient number, since it is larger than the sum of its proper divisors (106608914).

211191742 is a wasteful number, since it uses less digits than its factorization.

211191742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337682.

The product of its digits is 1008, while the sum is 28.

The square root of 211191742 is about 14532.4375794290. The cubic root of 211191742 is about 595.5144593656.

The spelling of 211191742 in words is "two hundred eleven million, one hundred ninety-one thousand, seven hundred forty-two".