285072213 has 16 divisors (see below), whose sum is σ = 388152000. Its totient is φ = 186036864.

The previous prime is 285072209. The next prime is 285072239. The reversal of 285072213 is 312270582.

It is not a de Polignac number, because 285072213 - 2² = 285072209 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285072913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77545 + ... + 81137.

It is an arithmetic number, because the mean of its divisors is an integer number (24259500).

Almost surely, 2^285072213 is an apocalyptic number.

It is an amenable number.

285072213 is a deficient number, since it is larger than the sum of its proper divisors (103079787).

285072213 is a wasteful number, since it uses less digits than its factorization.

285072213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4148.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 285072213 is about 16884.0816451473. The cubic root of 285072213 is about 658.1400134110.

The spelling of 285072213 in words is "two hundred eighty-five million, seventy-two thousand, two hundred thirteen".