213205646512 has 20 divisors (see below), whose sum is σ = 413325741640. Its totient is φ = 106540939008.

The previous prime is 213205646509. The next prime is 213205646519. The reversal of 213205646512 is 215646502312.

It is a super-2 number, since 2×213205646512² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213205646519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3839337 + ... + 3894472.

It is an arithmetic number, because the mean of its divisors is an integer number (20666287082).

Almost surely, 2^213205646512 is an apocalyptic number.

It is an amenable number.

213205646512 is a deficient number, since it is larger than the sum of its proper divisors (200120095128).

213205646512 is a wasteful number, since it uses less digits than its factorization.

213205646512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7735540 (or 7735534 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 213205646512 in words is "two hundred thirteen billion, two hundred five million, six hundred forty-six thousand, five hundred twelve".