2231660 has 24 divisors (see below), whose sum is σ = 4716096. Its totient is φ = 887040.

The previous prime is 2231653. The next prime is 2231681. The reversal of 2231660 is 661322.

It is a super-3 number, since 3×2231660³ = 33343051444614888000, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4589 + ... + 5051.

It is an arithmetic number, because the mean of its divisors is an integer number (196504).

2^2231660 is an apocalyptic number.

2231660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2231660 is an abundant number, since it is smaller than the sum of its proper divisors (2484436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2231660 is a wasteful number, since it uses less digits than its factorization.

2231660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713 (or 711 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 2231660 is about 1493.8741580200. The cubic root of 2231660 is about 130.6800653806.

Adding to 2231660 its reverse (661322), we get a palindrome (2892982).

The spelling of 2231660 in words is "two million, two hundred thirty-one thousand, six hundred sixty".