21527056 has 10 divisors (see below), whose sum is σ = 41708702. Its totient is φ = 10763520.

The previous prime is 21527029. The next prime is 21527059. The reversal of 21527056 is 65072512.

It can be written as a sum of positive squares in only one way, i.e., 17977600 + 3549456 = 4240^2 + 1884^2 .

It is not an unprimeable number, because it can be changed into a prime (21527059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672705 + ... + 672736.

Almost surely, 2^21527056 is an apocalyptic number.

It is an amenable number.

21527056 is a deficient number, since it is larger than the sum of its proper divisors (20181646).

21527056 is a wasteful number, since it uses less digits than its factorization.

21527056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345449 (or 1345443 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 21527056 is about 4639.7258539703. The cubic root of 21527056 is about 278.1814801089.

Adding to 21527056 its reverse (65072512), we get a palindrome (86599568).

The spelling of 21527056 in words is "twenty-one million, five hundred twenty-seven thousand, fifty-six".