213428493 has 16 divisors (see below), whose sum is σ = 323904000. Its totient is φ = 138814560.

The previous prime is 213428461. The next prime is 213428573. The reversal of 213428493 is 394824312.

It is not a de Polignac number, because 213428493 - 2⁵ = 213428461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213428093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95293 + ... + 97506.

It is an arithmetic number, because the mean of its divisors is an integer number (20244000).

Almost surely, 2^213428493 is an apocalyptic number.

It is an amenable number.

213428493 is a deficient number, since it is larger than the sum of its proper divisors (110475507).

213428493 is a wasteful number, since it uses less digits than its factorization.

213428493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192849 (or 192843 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 213428493 is about 14609.1920721168. The cubic root of 213428493 is about 597.6094632056.

The spelling of 213428493 in words is "two hundred thirteen million, four hundred twenty-eight thousand, four hundred ninety-three".