2154663 has 24 divisors (see below), whose sum is σ = 3714048. Its totient is φ = 1176912.

The previous prime is 2154643. The next prime is 2154667. The reversal of 2154663 is 3664512.

It is not a de Polignac number, because 2154663 - 2¹⁰ = 2153639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 706 + ... + 2192.

It is an arithmetic number, because the mean of its divisors is an integer number (154752).

2^2154663 is an apocalyptic number.

2154663 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2154663 is a deficient number, since it is larger than the sum of its proper divisors (1559385).

2154663 is a wasteful number, since it uses less digits than its factorization.

2154663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1523 (or 1520 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 2154663 is about 1467.8770384470. The cubic root of 2154663 is about 129.1595286147.

It can be divided in two parts, 21546 and 63, that added together give a square (21609 = 147²).

The spelling of 2154663 in words is "two million, one hundred fifty-four thousand, six hundred sixty-three".