213061243 has 4 divisors (see below), whose sum is σ = 213485328. Its totient is φ = 212637160.

The previous prime is 213061241. The next prime is 213061267. The reversal of 213061243 is 342160312.

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 213061243 - 2¹ = 213061241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213061241) 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, 211288 + ... + 212293.

It is an arithmetic number, because the mean of its divisors is an integer number (53371332).

Almost surely, 2^213061243 is an apocalyptic number.

213061243 is a deficient number, since it is larger than the sum of its proper divisors (424085).

213061243 is an equidigital number, since it uses as much as digits as its factorization.

213061243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424084.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 213061243 is about 14596.6175191378. The cubic root of 213061243 is about 597.2664941923.

The spelling of 213061243 in words is "two hundred thirteen million, sixty-one thousand, two hundred forty-three".