211990465 has 8 divisors (see below), whose sum is σ = 255950208. Its totient is φ = 168551280.

The previous prime is 211990463. The next prime is 211990469. The reversal of 211990465 is 564099112.

211990465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 211990465 - 2¹ = 211990463 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211990463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129241 + ... + 130870.

It is an arithmetic number, because the mean of its divisors is an integer number (31993776).

Almost surely, 2^211990465 is an apocalyptic number.

It is an amenable number.

211990465 is a deficient number, since it is larger than the sum of its proper divisors (43959743).

211990465 is a wasteful number, since it uses less digits than its factorization.

211990465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260279.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 211990465 is about 14559.8923416349. The cubic root of 211990465 is about 596.2642562301.

The spelling of 211990465 in words is "two hundred eleven million, nine hundred ninety thousand, four hundred sixty-five".