9921536 has 22 divisors (see below), whose sum is σ = 19835430. Its totient is φ = 4960256.

The previous prime is 9921529. The next prime is 9921577. The reversal of 9921536 is 6351299.

It can be written as a sum of positive squares in only one way, i.e., 8667136 + 1254400 = 2944^2 + 1120^2 .

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 9921496 and 9921505.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3821 + ... + 5868.

Almost surely, 2^9921536 is an apocalyptic number.

It is an amenable number.

9921536 is a deficient number, since it is larger than the sum of its proper divisors (9913894).

9921536 is an equidigital number, since it uses as much as digits as its factorization.

9921536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9709 (or 9691 counting only the distinct ones).

The product of its digits is 14580, while the sum is 35.

The square root of 9921536 is about 3149.8469804103. The cubic root of 9921536 is about 214.8785035565.

The spelling of 9921536 in words is "nine million, nine hundred twenty-one thousand, five hundred thirty-six".