21625112 has 8 divisors (see below), whose sum is σ = 40547100. Its totient is φ = 10812552.

The previous prime is 21625111. The next prime is 21625117. The reversal of 21625112 is 21152612.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21625111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1351562 + ... + 1351577.

Almost surely, 2^21625112 is an apocalyptic number.

It is an amenable number.

21625112 is a deficient number, since it is larger than the sum of its proper divisors (18921988).

21625112 is a wasteful number, since it uses less digits than its factorization.

21625112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2703145 (or 2703141 counting only the distinct ones).

The product of its digits is 240, while the sum is 20.

The square root of 21625112 is about 4650.2808517336. The cubic root of 21625112 is about 278.6032137552.

Adding to 21625112 its reverse (21152612), we get a palindrome (42777724).

The spelling of 21625112 in words is "twenty-one million, six hundred twenty-five thousand, one hundred twelve".