2231555 has 8 divisors (see below), whose sum is σ = 2689632. Its totient is φ = 1777408.

The previous prime is 2231533. The next prime is 2231587. The reversal of 2231555 is 5551322.

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

It is a cyclic number.

It is not a de Polignac number, because 2231555 - 2⁶ = 2231491 is a prime.

It is a super-3 number, since 3×2231555³ = 33338345276541836625, which contains 333 as substring.

It is a d-powerful number, because it can be written as 2⁵ + 2¹⁸ + 3 + 1 + 5⁴ + 5⁶ + 5⁹ .

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 2231555.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 467 + ... + 2163.

It is an arithmetic number, because the mean of its divisors is an integer number (336204).

2^2231555 is an apocalyptic number.

2231555 is a deficient number, since it is larger than the sum of its proper divisors (458077).

2231555 is a wasteful number, since it uses less digits than its factorization.

2231555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1965.

The product of its digits is 1500, while the sum is 23.

The square root of 2231555 is about 1493.8390140842. The cubic root of 2231555 is about 130.6780158417.

Adding to 2231555 its reverse (5551322), we get a palindrome (7782877).

The spelling of 2231555 in words is "two million, two hundred thirty-one thousand, five hundred fifty-five".