2213729 has 8 divisors (see below), whose sum is σ = 2539008. Its totient is φ = 1890720.

The previous prime is 2213711. The next prime is 2213759. The reversal of 2213729 is 9273122.

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

It is a cyclic number.

It is not a de Polignac number, because 2213729 - 2⁸ = 2213473 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2213698 and 2213707.

It is not an unprimeable number, because it can be changed into a prime (2213759) 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, 3344 + ... + 3950.

It is an arithmetic number, because the mean of its divisors is an integer number (317376).

2^2213729 is an apocalyptic number.

It is an amenable number.

2213729 is a deficient number, since it is larger than the sum of its proper divisors (325279).

2213729 is an equidigital number, since it uses as much as digits as its factorization.

2213729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135.

The product of its digits is 1512, while the sum is 26.

The square root of 2213729 is about 1487.8605445404. The cubic root of 2213729 is about 130.3291265851.

The spelling of 2213729 in words is "two million, two hundred thirteen thousand, seven hundred twenty-nine".