213025811 has 4 divisors (see below), whose sum is σ = 214035624. Its totient is φ = 212016000.

The previous prime is 213025789. The next prime is 213025823. The reversal of 213025811 is 118520312.

It is a happy number.

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 213025811 - 2¹⁴ = 213009427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213025711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 504590 + ... + 505011.

It is an arithmetic number, because the mean of its divisors is an integer number (53508906).

Almost surely, 2^213025811 is an apocalyptic number.

213025811 is a deficient number, since it is larger than the sum of its proper divisors (1009813).

213025811 is a wasteful number, since it uses less digits than its factorization.

213025811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009812.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 213025811 is about 14595.4037628289. The cubic root of 213025811 is about 597.2333839633.

The spelling of 213025811 in words is "two hundred thirteen million, twenty-five thousand, eight hundred eleven".