21182230 has 16 divisors (see below), whose sum is σ = 39015504. Its totient is φ = 8275680.

The previous prime is 21182201. The next prime is 21182243. The reversal of 21182230 is 3228112.

It is a junction number, because it is equal to n+sod(n) for n = 21182198 and 21182207.

It is a congruent number.

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, 24201 + ... + 25060.

It is an arithmetic number, because the mean of its divisors is an integer number (2438469).

Almost surely, 2^21182230 is an apocalyptic number.

21182230 is a deficient number, since it is larger than the sum of its proper divisors (17833274).

21182230 is a wasteful number, since it uses less digits than its factorization.

21182230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49311.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 21182230 is about 4602.4156700585. The cubic root of 21182230 is about 276.6881501357.

It can be divided in two parts, 21182 and 230, that added together give a palindrome (21412).

The spelling of 21182230 in words is "twenty-one million, one hundred eighty-two thousand, two hundred thirty".