2213320731 has 4 divisors (see below), whose sum is σ = 2951094312. Its totient is φ = 1475547152.

The previous prime is 2213320727. The next prime is 2213320783. The reversal of 2213320731 is 1370233122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2213320731 - 2² = 2213320727 is a prime.

It is a super-2 number, since 2×2213320731² = 9797577316548748722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2213320931) 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, 368886786 + ... + 368886791.

It is an arithmetic number, because the mean of its divisors is an integer number (737773578).

Almost surely, 2^2213320731 is an apocalyptic number.

2213320731 is a deficient number, since it is larger than the sum of its proper divisors (737773581).

2213320731 is an equidigital number, since it uses as much as digits as its factorization.

2213320731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737773580.

The product of its (nonzero) digits is 1512, while the sum is 24.

The square root of 2213320731 is about 47045.9427687447. The cubic root of 2213320731 is about 1303.2111406968.

Adding to 2213320731 its reverse (1370233122), we get a palindrome (3583553853).

The spelling of 2213320731 in words is "two billion, two hundred thirteen million, three hundred twenty thousand, seven hundred thirty-one".