211405130 has 8 divisors (see below), whose sum is σ = 380529252. Its totient is φ = 84562048.

The previous prime is 211405109. The next prime is 211405141. The reversal of 211405130 is 31504112.

It can be written as a sum of positive squares in 2 ways, for example, as 202578289 + 8826841 = 14233^2 + 2971^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 211405099 and 211405108.

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, 10570247 + ... + 10570266.

Almost surely, 2^211405130 is an apocalyptic number.

211405130 is a deficient number, since it is larger than the sum of its proper divisors (169124122).

211405130 is a wasteful number, since it uses less digits than its factorization.

211405130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21140520.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 211405130 is about 14539.7775086141. Note that the first 3 decimals coincide. The cubic root of 211405130 is about 595.7149609938.

Adding to 211405130 its reverse (31504112), we get a palindrome (242909242).

The spelling of 211405130 in words is "two hundred eleven million, four hundred five thousand, one hundred thirty".