211903304 has 16 divisors (see below), whose sum is σ = 401784300. Its totient is φ = 104760832.

The previous prime is 211903277. The next prime is 211903313. The reversal of 211903304 is 403309112.

It can be written as a sum of positive squares in 2 ways, for example, as 207072100 + 4831204 = 14390^2 + 2198^2 .

It is a super-2 number, since 2×211903304² = 89806020492232832, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211903304.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148097 + ... + 149520.

Almost surely, 2^211903304 is an apocalyptic number.

It is an amenable number.

211903304 is a deficient number, since it is larger than the sum of its proper divisors (189880996).

211903304 is a wasteful number, since it uses less digits than its factorization.

211903304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297712 (or 297708 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 211903304 is about 14556.8988455646. The cubic root of 211903304 is about 596.1825259611.

The spelling of 211903304 in words is "two hundred eleven million, nine hundred three thousand, three hundred four".