2155922 has 8 divisors (see below), whose sum is σ = 3267516. Its totient is φ = 1066752.

The previous prime is 2155883. The next prime is 2155931. The reversal of 2155922 is 2295512.

It can be written as a sum of positive squares in 2 ways, for example, as 1852321 + 303601 = 1361^2 + 551^2 .

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2155891 and 2155900.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5363 + ... + 5750.

2^2155922 is an apocalyptic number.

2155922 is a deficient number, since it is larger than the sum of its proper divisors (1111594).

2155922 is a wasteful number, since it uses less digits than its factorization.

2155922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11212.

The product of its digits is 1800, while the sum is 26.

The square root of 2155922 is about 1468.3058264544. The cubic root of 2155922 is about 129.1846802950.

The spelling of 2155922 in words is "two million, one hundred fifty-five thousand, nine hundred twenty-two".