213287861 has 8 divisors (see below), whose sum is σ = 215737344. Its totient is φ = 210845200.

The previous prime is 213287849. The next prime is 213287897. The reversal of 213287861 is 168782312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213287861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213287801) 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, 85940 + ... + 88386.

It is an arithmetic number, because the mean of its divisors is an integer number (26967168).

Almost surely, 2^213287861 is an apocalyptic number.

It is an amenable number.

213287861 is a deficient number, since it is larger than the sum of its proper divisors (2449483).

213287861 is a wasteful number, since it uses less digits than its factorization.

213287861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3411.

The product of its digits is 32256, while the sum is 38.

The square root of 213287861 is about 14604.3781449263. The cubic root of 213287861 is about 597.4781757054.

The spelling of 213287861 in words is "two hundred thirteen million, two hundred eighty-seven thousand, eight hundred sixty-one".