21415150 has 12 divisors (see below), whose sum is σ = 39832272. Its totient is φ = 8566040.

The previous prime is 21415133. The next prime is 21415153. The reversal of 21415150 is 5151412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21415153) 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 in 5 ways as a sum of consecutive naturals, for example, 214102 + ... + 214201.

It is an arithmetic number, because the mean of its divisors is an integer number (3319356).

Almost surely, 2^21415150 is an apocalyptic number.

21415150 is a deficient number, since it is larger than the sum of its proper divisors (18417122).

21415150 is a wasteful number, since it uses less digits than its factorization.

21415150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428315 (or 428310 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 21415150 is about 4627.6505918230. The cubic root of 21415150 is about 277.6986106246.

Adding to 21415150 its reverse (5151412), we get a palindrome (26566562).

The spelling of 21415150 in words is "twenty-one million, four hundred fifteen thousand, one hundred fifty".