32991055 has 4 divisors (see below), whose sum is σ = 39589272. Its totient is φ = 26392840.

The previous prime is 32991053. The next prime is 32991059. The reversal of 32991055 is 55019923.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55019923 = 7 ⋅7859989.

It is not a de Polignac number, because 32991055 - 2¹ = 32991053 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 32991055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32991053) 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, 3299101 + ... + 3299110.

It is an arithmetic number, because the mean of its divisors is an integer number (9897318).

Almost surely, 2^32991055 is an apocalyptic number.

32991055 is a deficient number, since it is larger than the sum of its proper divisors (6598217).

32991055 is an equidigital number, since it uses as much as digits as its factorization.

32991055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6598216.

The product of its (nonzero) digits is 12150, while the sum is 34.

The square root of 32991055 is about 5743.7840314552. The cubic root of 32991055 is about 320.7244491740.

The spelling of 32991055 in words is "thirty-two million, nine hundred ninety-one thousand, fifty-five".