21625102 has 4 divisors (see below), whose sum is σ = 32437656. Its totient is φ = 10812550.

The previous prime is 21625099. The next prime is 21625103. The reversal of 21625102 is 20152612.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21625102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21625103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5406274 + ... + 5406277.

It is an arithmetic number, because the mean of its divisors is an integer number (8109414).

Almost surely, 2^21625102 is an apocalyptic number.

21625102 is a deficient number, since it is larger than the sum of its proper divisors (10812554).

21625102 is a wasteful number, since it uses less digits than its factorization.

21625102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10812553.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 21625102 is about 4650.2797765296. The cubic root of 21625102 is about 278.6031708108.

Adding to 21625102 its reverse (20152612), we get a palindrome (41777714).

The spelling of 21625102 in words is "twenty-one million, six hundred twenty-five thousand, one hundred two".