211864950 has 144 divisors (see below), whose sum is σ = 642198480. Its totient is φ = 51321600.

The previous prime is 211864949. The next prime is 211864951. The reversal of 211864950 is 59468112.

211864950 is a `hidden beast` number, since 2 + 1 + 1 + 8 + 649 + 5 + 0 = 666.

211864950 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (211864949) and next prime (211864951).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211864951) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 162702 + ... + 163998.

Almost surely, 2^211864950 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211864950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (321099240).

211864950 is an abundant number, since it is smaller than the sum of its proper divisors (430333530).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211864950 is a wasteful number, since it uses less digits than its factorization.

211864950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340 (or 1318 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 211864950 is about 14555.5814037090. The cubic root of 211864950 is about 596.1465545788.

The spelling of 211864950 in words is "two hundred eleven million, eight hundred sixty-four thousand, nine hundred fifty".