2193551 has 4 divisors (see below), whose sum is σ = 2196912. Its totient is φ = 2190192.

The previous prime is 2193547. The next prime is 2193553. The reversal of 2193551 is 1553912.

2193551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2193551 - 2² = 2193547 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 2193551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2193553) 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, 350 + ... + 2123.

It is an arithmetic number, because the mean of its divisors is an integer number (549228).

2^2193551 is an apocalyptic number.

2193551 is a deficient number, since it is larger than the sum of its proper divisors (3361).

2193551 is an equidigital number, since it uses as much as digits as its factorization.

2193551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3360.

The product of its digits is 1350, while the sum is 26.

The square root of 2193551 is about 1481.0641444583. The cubic root of 2193551 is about 129.9319367574.

It can be divided in two parts, 2193 and 551, that added together give a cube (2744 = 14³).

The spelling of 2193551 in words is "two million, one hundred ninety-three thousand, five hundred fifty-one".