211361387 has 4 divisors (see below), whose sum is σ = 213454176. Its totient is φ = 209268600.

The previous prime is 211361369. The next prime is 211361399. The reversal of 211361387 is 783163112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211361387 - 2¹² = 211357291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211361287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1046243 + ... + 1046444.

It is an arithmetic number, because the mean of its divisors is an integer number (53363544).

Almost surely, 2^211361387 is an apocalyptic number.

211361387 is a deficient number, since it is larger than the sum of its proper divisors (2092789).

211361387 is a wasteful number, since it uses less digits than its factorization.

211361387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2092788.

The product of its digits is 6048, while the sum is 32.

The square root of 211361387 is about 14538.2731780635. The cubic root of 211361387 is about 595.6738706049.

The spelling of 211361387 in words is "two hundred eleven million, three hundred sixty-one thousand, three hundred eighty-seven".