211710381490 has 8 divisors (see below), whose sum is σ = 381078686700. Its totient is φ = 84684152592.

The previous prime is 211710381409. The next prime is 211710381499. The reversal of 211710381490 is 94183017112.

It can be written as a sum of positive squares in 2 ways, for example, as 199209576241 + 12500805249 = 446329^2 + 111807^2 .

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

It is not an unprimeable number, because it can be changed into a prime (211710381499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10585519065 + ... + 10585519084.

Almost surely, 2^211710381490 is an apocalyptic number.

211710381490 is a deficient number, since it is larger than the sum of its proper divisors (169368305210).

211710381490 is a wasteful number, since it uses less digits than its factorization.

211710381490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21171038156.

The product of its (nonzero) digits is 12096, while the sum is 37.

The spelling of 211710381490 in words is "two hundred eleven billion, seven hundred ten million, three hundred eighty-one thousand, four hundred ninety".