213214512645 has 24 divisors (see below), whose sum is σ = 389022972000. Its totient is φ = 107729437536.

The previous prime is 213214512613. The next prime is 213214512701. The reversal of 213214512645 is 546215412312.

213214512645 is a `hidden beast` number, since 2 + 1 + 3 + 2 + 1 + 4 + 5 + 1 + 2 + 645 = 666.

It is not a de Polignac number, because 213214512645 - 2⁵ = 213214512613 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 124685995 + ... + 124687704.

It is an arithmetic number, because the mean of its divisors is an integer number (16209290500).

Almost surely, 2^213214512645 is an apocalyptic number.

It is an amenable number.

213214512645 is a deficient number, since it is larger than the sum of its proper divisors (175808459355).

213214512645 is a wasteful number, since it uses less digits than its factorization.

213214512645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249373729 (or 249373726 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

Adding to 213214512645 its reverse (546215412312), we get a palindrome (759429924957).

The spelling of 213214512645 in words is "two hundred thirteen billion, two hundred fourteen million, five hundred twelve thousand, six hundred forty-five".