21254232 has 32 divisors (see below), whose sum is σ = 53265600. Its totient is φ = 7067424.

The previous prime is 21254227. The next prime is 21254249. The reversal of 21254232 is 23245212.

It is a junction number, because it is equal to n+sod(n) for n = 21254199 and 21254208.

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, 12319 + ... + 13937.

It is an arithmetic number, because the mean of its divisors is an integer number (1664550).

Almost surely, 2^21254232 is an apocalyptic number.

It is an amenable number.

21254232 is an abundant number, since it is smaller than the sum of its proper divisors (32011368).

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

21254232 is a wasteful number, since it uses less digits than its factorization.

21254232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2175 (or 2171 counting only the distinct ones).

The product of its digits is 960, while the sum is 21.

The square root of 21254232 is about 4610.2312306434. The cubic root of 21254232 is about 277.0012989378.

Adding to 21254232 its reverse (23245212), we get a palindrome (44499444).

The spelling of 21254232 in words is "twenty-one million, two hundred fifty-four thousand, two hundred thirty-two".