213893733 has 4 divisors (see below), whose sum is σ = 285191648. Its totient is φ = 142595820.

The previous prime is 213893731. The next prime is 213893737. The reversal of 213893733 is 337398312.

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 not a de Polignac number, because 213893733 - 2¹ = 213893731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213893691 and 213893700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213893731) 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, 35648953 + ... + 35648958.

It is an arithmetic number, because the mean of its divisors is an integer number (71297912).

Almost surely, 2^213893733 is an apocalyptic number.

It is an amenable number.

213893733 is a deficient number, since it is larger than the sum of its proper divisors (71297915).

213893733 is an equidigital number, since it uses as much as digits as its factorization.

213893733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71297914.

The product of its digits is 81648, while the sum is 39.

The square root of 213893733 is about 14625.1062560243. The cubic root of 213893733 is about 598.0433791047.

The spelling of 213893733 in words is "two hundred thirteen million, eight hundred ninety-three thousand, seven hundred thirty-three".