213042345 has 24 divisors (see below), whose sum is σ = 359761536. Its totient is φ = 107639712.

The previous prime is 213042331. The next prime is 213042367. The reversal of 213042345 is 543240312.

It is not a de Polignac number, because 213042345 - 2⁹ = 213041833 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14257 + ... + 25086.

It is an arithmetic number, because the mean of its divisors is an integer number (14990064).

Almost surely, 2^213042345 is an apocalyptic number.

It is an amenable number.

213042345 is a deficient number, since it is larger than the sum of its proper divisors (146719191).

213042345 is a wasteful number, since it uses less digits than its factorization.

213042345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39389 (or 39370 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 213042345 is about 14595.9701630279. The cubic root of 213042345 is about 597.2488349882.

Adding to 213042345 its reverse (543240312), we get a palindrome (756282657).

The spelling of 213042345 in words is "two hundred thirteen million, forty-two thousand, three hundred forty-five".