21252110 has 16 divisors (see below), whose sum is σ = 41731632. Its totient is φ = 7728000.

The previous prime is 21252109. The next prime is 21252113. The reversal of 21252110 is 1125212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21252113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96491 + ... + 96710.

It is an arithmetic number, because the mean of its divisors is an integer number (2608227).

Almost surely, 2^21252110 is an apocalyptic number.

21252110 is a deficient number, since it is larger than the sum of its proper divisors (20479522).

21252110 is a wasteful number, since it uses less digits than its factorization.

21252110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193219.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 21252110 is about 4610.0010845986. The cubic root of 21252110 is about 276.9920801256.

Adding to 21252110 its reverse (1125212), we get a palindrome (22377322).

The spelling of 21252110 in words is "twenty-one million, two hundred fifty-two thousand, one hundred ten".