213004145 has 32 divisors (see below), whose sum is σ = 268531200. Its totient is φ = 162100224.

The previous prime is 213004139. The next prime is 213004157. The reversal of 213004145 is 541400312.

It is a cyclic number.

It is not a de Polignac number, because 213004145 - 2¹² = 213000049 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2393261 + ... + 2393349.

It is an arithmetic number, because the mean of its divisors is an integer number (8391600).

Almost surely, 2^213004145 is an apocalyptic number.

It is an amenable number.

213004145 is a deficient number, since it is larger than the sum of its proper divisors (55527055).

213004145 is an equidigital number, since it uses as much as digits as its factorization.

213004145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 213004145 is about 14594.6615239957. The cubic root of 213004145 is about 597.2131358736.

Adding to 213004145 its reverse (541400312), we get a palindrome (754404457).

The spelling of 213004145 in words is "two hundred thirteen million, four thousand, one hundred forty-five".