21295528 has 16 divisors (see below), whose sum is σ = 40284180. Its totient is φ = 10553088.

The previous prime is 21295513. The next prime is 21295529. The reversal of 21295528 is 82559212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12545764 + 8749764 = 3542^2 + 2958^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21295493 and 21295502.

It is not an unprimeable number, because it can be changed into a prime (21295529) 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 3 ways as a sum of consecutive naturals, for example, 10875 + ... + 12682.

Almost surely, 2^21295528 is an apocalyptic number.

It is an amenable number.

21295528 is a deficient number, since it is larger than the sum of its proper divisors (18988652).

21295528 is a wasteful number, since it uses less digits than its factorization.

21295528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23676 (or 23672 counting only the distinct ones).

The product of its digits is 14400, while the sum is 34.

The square root of 21295528 is about 4614.7077913991. The cubic root of 21295528 is about 277.1805831562.

The spelling of 21295528 in words is "twenty-one million, two hundred ninety-five thousand, five hundred twenty-eight".