32730231 has 4 divisors (see below), whose sum is σ = 43640312. Its totient is φ = 21820152.

The previous prime is 32730199. The next prime is 32730239. The reversal of 32730231 is 13203723.

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

It is not a de Polignac number, because 32730231 - 2⁵ = 32730199 is a prime.

It is a super-2 number, since 2×32730231² = 2142536042626722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 32730198 and 32730207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32730239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5455036 + ... + 5455041.

It is an arithmetic number, because the mean of its divisors is an integer number (10910078).

Almost surely, 2^32730231 is an apocalyptic number.

32730231 is a deficient number, since it is larger than the sum of its proper divisors (10910081).

32730231 is a wasteful number, since it uses less digits than its factorization.

32730231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10910080.

The product of its (nonzero) digits is 756, while the sum is 21.

The square root of 32730231 is about 5721.0340848486. The cubic root of 32730231 is about 319.8770067696.

Adding to 32730231 its reverse (13203723), we get a palindrome (45933954).

The spelling of 32730231 in words is "thirty-two million, seven hundred thirty thousand, two hundred thirty-one".