211485730 has 8 divisors (see below), whose sum is σ = 380674332. Its totient is φ = 84594288.

The previous prime is 211485727. The next prime is 211485731. The reversal of 211485730 is 37584112.

It can be written as a sum of positive squares in 2 ways, for example, as 209178369 + 2307361 = 14463^2 + 1519^2 .

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 = 211485692 and 211485701.

It is not an unprimeable number, because it can be changed into a prime (211485731) 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, 10574277 + ... + 10574296.

Almost surely, 2^211485730 is an apocalyptic number.

211485730 is a deficient number, since it is larger than the sum of its proper divisors (169188602).

211485730 is a wasteful number, since it uses less digits than its factorization.

211485730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21148580.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 211485730 is about 14542.5489512671. The cubic root of 211485730 is about 595.7906585027.

The spelling of 211485730 in words is "two hundred eleven million, four hundred eighty-five thousand, seven hundred thirty".