21295150 has 12 divisors (see below), whose sum is σ = 39609072. Its totient is φ = 8518040.

The previous prime is 21295133. The next prime is 21295151. The reversal of 21295150 is 5159212.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21295151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 212902 + ... + 213001.

It is an arithmetic number, because the mean of its divisors is an integer number (3300756).

Almost surely, 2^21295150 is an apocalyptic number.

21295150 is a deficient number, since it is larger than the sum of its proper divisors (18313922).

21295150 is a wasteful number, since it uses less digits than its factorization.

21295150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425915 (or 425910 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 21295150 is about 4614.6668352114. Note that the first 3 decimals coincide. The cubic root of 21295150 is about 277.1789431424.

The spelling of 21295150 in words is "twenty-one million, two hundred ninety-five thousand, one hundred fifty".