32172643 has 16 divisors (see below), whose sum is σ = 35354880. Its totient is φ = 29169504.

The previous prime is 32172617. The next prime is 32172649. The reversal of 32172643 is 34627123.

It is not a de Polignac number, because 32172643 - 2⁵ = 32172611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32172649) 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, 42930 + ... + 43672.

It is an arithmetic number, because the mean of its divisors is an integer number (2209680).

Almost surely, 2^32172643 is an apocalyptic number.

32172643 is a deficient number, since it is larger than the sum of its proper divisors (3182237).

32172643 is a wasteful number, since it uses less digits than its factorization.

32172643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858.

The product of its digits is 6048, while the sum is 28.

The square root of 32172643 is about 5672.0933525463. The cubic root of 32172643 is about 318.0501318588.

Adding to 32172643 its reverse (34627123), we get a palindrome (66799766).

The spelling of 32172643 in words is "thirty-two million, one hundred seventy-two thousand, six hundred forty-three".