2155958 has 8 divisors (see below), whose sum is σ = 3695952. Its totient is φ = 923976.

The previous prime is 2155931. The next prime is 2155961. The reversal of 2155958 is 8595512.

2155958 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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, 76985 + ... + 77012.

It is an arithmetic number, because the mean of its divisors is an integer number (461994).

2^2155958 is an apocalyptic number.

2155958 is a deficient number, since it is larger than the sum of its proper divisors (1539994).

2155958 is a wasteful number, since it uses less digits than its factorization.

2155958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154006.

The product of its digits is 18000, while the sum is 35.

The square root of 2155958 is about 1468.3180854297. The cubic root of 2155958 is about 129.1853993412.

It can be divided in two parts, 2155 and 958, that added together give a palindrome (3113).

The spelling of 2155958 in words is "two million, one hundred fifty-five thousand, nine hundred fifty-eight".