32720223 has 16 divisors (see below), whose sum is σ = 48625920. Its totient is φ = 19449216.

The previous prime is 32720209. The next prime is 32720231. The reversal of 32720223 is 32202723.

It is not a de Polignac number, because 32720223 - 2¹⁰ = 32719199 is a prime.

It is a super-2 number, since 2×32720223² = 2141225986339458, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 32720223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32720273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15915 + ... + 17852.

It is an arithmetic number, because the mean of its divisors is an integer number (3039120).

Almost surely, 2^32720223 is an apocalyptic number.

32720223 is a deficient number, since it is larger than the sum of its proper divisors (15905697).

32720223 is a wasteful number, since it uses less digits than its factorization.

32720223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33806.

The product of its (nonzero) digits is 1008, while the sum is 21.

The square root of 32720223 is about 5720.1593509272. The cubic root of 32720223 is about 319.8444002635.

Adding to 32720223 its reverse (32202723), we get a palindrome (64922946).

The spelling of 32720223 in words is "thirty-two million, seven hundred twenty thousand, two hundred twenty-three".