32551 has 4 divisors (see below), whose sum is σ = 33352. Its totient is φ = 31752.

The previous prime is 32537. The next prime is 32561. The reversal of 32551 is 15523.

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

It is a 4-Lehmer number, since φ(32551) divides (32551-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 32551 - 2⁷ = 32423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336 + ... + 421.

It is an arithmetic number, because the mean of its divisors is an integer number (8338).

2³²⁵⁵¹ is an apocalyptic number.

32551 is a deficient number, since it is larger than the sum of its proper divisors (801).

32551 is an equidigital number, since it uses as much as digits as its factorization.

32551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800.

The product of its digits is 150, while the sum is 16.

The square root of 32551 is about 180.4189568754. The cubic root of 32551 is about 31.9292054739.

The spelling of 32551 in words is "thirty-two thousand, five hundred fifty-one".