213209293 has 4 divisors (see below), whose sum is σ = 232591968. Its totient is φ = 193826620.

The previous prime is 213209263. The next prime is 213209309. The reversal of 213209293 is 392902312.

It is a happy number.

213209293 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213209293 - 2⁵ = 213209261 is a prime.

It is a super-3 number, since 3×213209293³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213209233) 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, 9691321 + ... + 9691342.

It is an arithmetic number, because the mean of its divisors is an integer number (58147992).

Almost surely, 2^213209293 is an apocalyptic number.

It is an amenable number.

213209293 is a deficient number, since it is larger than the sum of its proper divisors (19382675).

213209293 is a wasteful number, since it uses less digits than its factorization.

213209293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19382674.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 213209293 is about 14601.6880188559. The cubic root of 213209293 is about 597.4048031432.

The spelling of 213209293 in words is "two hundred thirteen million, two hundred nine thousand, two hundred ninety-three".