221713733 has 4 divisors (see below), whose sum is σ = 222331680. Its totient is φ = 221095788.

The previous prime is 221713703. The next prime is 221713747. The reversal of 221713733 is 337317122.

221713733 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 221713733 - 2⁶ = 221713669 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221713696 and 221713705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221713703) 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, 308435 + ... + 309152.

It is an arithmetic number, because the mean of its divisors is an integer number (55582920).

Almost surely, 2^221713733 is an apocalyptic number.

It is an amenable number.

221713733 is a deficient number, since it is larger than the sum of its proper divisors (617947).

221713733 is an equidigital number, since it uses as much as digits as its factorization.

221713733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617946.

The product of its digits is 5292, while the sum is 29.

The square root of 221713733 is about 14890.0548353591. The cubic root of 221713733 is about 605.2445183325.

The spelling of 221713733 in words is "two hundred twenty-one million, seven hundred thirteen thousand, seven hundred thirty-three".