211450221 has 48 divisors (see below), whose sum is σ = 332904000. Its totient is φ = 128894976.

The previous prime is 211450207. The next prime is 211450237. The reversal of 211450221 is 122054112.

211450221 is a `hidden beast` number, since 211 + 450 + 2 + 2 + 1 = 666.

It is not a de Polignac number, because 211450221 - 2⁷ = 211450093 is a prime.

It is a super-2 number, since 2×211450221² = 89422391921897682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211450194 and 211450203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211455221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1095501 + ... + 1095693.

It is an arithmetic number, because the mean of its divisors is an integer number (6935500).

Almost surely, 2^211450221 is an apocalyptic number.

It is an amenable number.

211450221 is a deficient number, since it is larger than the sum of its proper divisors (121453779).

211450221 is a wasteful number, since it uses less digits than its factorization.

211450221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 211450221 is about 14541.3280342615. The cubic root of 211450221 is about 595.7573117065.

The spelling of 211450221 in words is "two hundred eleven million, four hundred fifty thousand, two hundred twenty-one".