2191230 has 48 divisors (see below), whose sum is σ = 5778864. Its totient is φ = 576000.

The previous prime is 2191229. The next prime is 2191243. The reversal of 2191230 is 321912.

2191230 = 660² + 661² + ... + 664².

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8605 + ... + 8855.

It is an arithmetic number, because the mean of its divisors is an integer number (120393).

2^2191230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2191230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2889432).

2191230 is an abundant number, since it is smaller than the sum of its proper divisors (3587634).

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

2191230 is a wasteful number, since it uses less digits than its factorization.

2191230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361 (or 358 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 2191230 is about 1480.2803788472. The cubic root of 2191230 is about 129.8860935178.

The spelling of 2191230 in words is "two million, one hundred ninety-one thousand, two hundred thirty".