213072345 has 48 divisors (see below), whose sum is σ = 388657152. Its totient is φ = 107775360.

The previous prime is 213072341. The next prime is 213072347. The reversal of 213072345 is 543270312.

It is not a de Polignac number, because 213072345 - 2² = 213072341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213072341) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 130635 + ... + 132255.

It is an arithmetic number, because the mean of its divisors is an integer number (8097024).

Almost surely, 2^213072345 is an apocalyptic number.

It is an amenable number.

213072345 is a deficient number, since it is larger than the sum of its proper divisors (175584807).

213072345 is a wasteful number, since it uses less digits than its factorization.

213072345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1782 (or 1779 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 213072345 is about 14596.9978077686. The cubic root of 213072345 is about 597.2768679505.

The spelling of 213072345 in words is "two hundred thirteen million, seventy-two thousand, three hundred forty-five".