213241245 has 32 divisors (see below), whose sum is σ = 390680832. Its totient is φ = 97293312.

The previous prime is 213241213. The next prime is 213241247. The reversal of 213241245 is 542142312.

It is not a de Polignac number, because 213241245 - 2⁵ = 213241213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213241247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62709 + ... + 66021.

It is an arithmetic number, because the mean of its divisors is an integer number (12208776).

Almost surely, 2^213241245 is an apocalyptic number.

It is an amenable number.

213241245 is a deficient number, since it is larger than the sum of its proper divisors (177439587).

213241245 is a wasteful number, since it uses less digits than its factorization.

213241245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3941.

The product of its digits is 1920, while the sum is 24.

The square root of 213241245 is about 14602.7820979428. The cubic root of 213241245 is about 597.4346444391.

Adding to 213241245 its reverse (542142312), we get a palindrome (755383557).

The spelling of 213241245 in words is "two hundred thirteen million, two hundred forty-one thousand, two hundred forty-five".