211423330 has 32 divisors (see below), whose sum is σ = 387212400. Its totient is φ = 83100672.

The previous prime is 211423321. The next prime is 211423351. The reversal of 211423330 is 33324112.

It can be written as a sum of positive squares in 8 ways, for example, as 94848121 + 116575209 = 9739^2 + 10797^2 .

It is a junction number, because it is equal to n+sod(n) for n = 211423298 and 211423307.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 371286 + ... + 371854.

Almost surely, 2^211423330 is an apocalyptic number.

211423330 is a deficient number, since it is larger than the sum of its proper divisors (175789070).

211423330 is a wasteful number, since it uses less digits than its factorization.

211423330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 211423330 is about 14540.4033644187. The cubic root of 211423330 is about 595.7320556612.

Adding to 211423330 its reverse (33324112), we get a palindrome (244747442).

The spelling of 211423330 in words is "two hundred eleven million, four hundred twenty-three thousand, three hundred thirty".