213057645 has 8 divisors (see below), whose sum is σ = 340892256. Its totient is φ = 113630736.

The previous prime is 213057643. The next prime is 213057661. The reversal of 213057645 is 546750312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 213057645 - 2¹ = 213057643 is a prime.

It is a super-3 number, since 3×213057645³ (a number of 26 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213057643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7101907 + ... + 7101936.

It is an arithmetic number, because the mean of its divisors is an integer number (42611532).

Almost surely, 2^213057645 is an apocalyptic number.

It is an amenable number.

213057645 is a deficient number, since it is larger than the sum of its proper divisors (127834611).

213057645 is a wasteful number, since it uses less digits than its factorization.

213057645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14203851.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 213057645 is about 14596.4942708857. The cubic root of 213057645 is about 597.2631321278.

The spelling of 213057645 in words is "two hundred thirteen million, fifty-seven thousand, six hundred forty-five".