2163551 has 8 divisors (see below), whose sum is σ = 2380224. Its totient is φ = 1954080.

The previous prime is 2163547. The next prime is 2163569. The reversal of 2163551 is 1553612.

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 2163551 - 2² = 2163547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2163571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1160 + ... + 2381.

It is an arithmetic number, because the mean of its divisors is an integer number (297528).

2^2163551 is an apocalyptic number.

2163551 is a deficient number, since it is larger than the sum of its proper divisors (216673).

2163551 is a wasteful number, since it uses less digits than its factorization.

2163551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3601.

The product of its digits is 900, while the sum is 23.

The square root of 2163551 is about 1470.9014242974. The cubic root of 2163551 is about 129.3368796338.

The spelling of 2163551 in words is "two million, one hundred sixty-three thousand, five hundred fifty-one".