10821550 has 12 divisors (see below), whose sum is σ = 20128176. Its totient is φ = 4328600.

The previous prime is 10821541. The next prime is 10821589. The reversal of 10821550 is 5512801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 108166 + ... + 108265.

It is an arithmetic number, because the mean of its divisors is an integer number (1677348).

Almost surely, 2^10821550 is an apocalyptic number.

10821550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10821550 is a deficient number, since it is larger than the sum of its proper divisors (9306626).

10821550 is a wasteful number, since it uses less digits than its factorization.

10821550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216443 (or 216438 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 10821550 is about 3289.6124391788. The cubic root of 10821550 is about 221.1888123860.

The spelling of 10821550 in words is "ten million, eight hundred twenty-one thousand, five hundred fifty".