211661364 has 36 divisors (see below), whose sum is σ = 516298496. Its totient is φ = 67484208.

The previous prime is 211661327. The next prime is 211661431. The reversal of 211661364 is 463166112.

211661364 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10324 + ... + 23019.

Almost surely, 2^211661364 is an apocalyptic number.

It is an amenable number.

211661364 is an abundant number, since it is smaller than the sum of its proper divisors (304637132).

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

211661364 is a wasteful number, since it uses less digits than its factorization.

211661364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33396 (or 33371 counting only the distinct ones).

The product of its digits is 5184, while the sum is 30.

The square root of 211661364 is about 14548.5863230762. The cubic root of 211661364 is about 595.9555429806.

The spelling of 211661364 in words is "two hundred eleven million, six hundred sixty-one thousand, three hundred sixty-four".