828221153 has 4 divisors (see below), whose sum is σ = 871811760. Its totient is φ = 784630548.

The previous prime is 828221117. The next prime is 828221161. The reversal of 828221153 is 351122828.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 828221153 - 2¹² = 828217057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (828271153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21795275 + ... + 21795312.

It is an arithmetic number, because the mean of its divisors is an integer number (217952940).

Almost surely, 2^828221153 is an apocalyptic number.

It is an amenable number.

828221153 is a deficient number, since it is larger than the sum of its proper divisors (43590607).

828221153 is a wasteful number, since it uses less digits than its factorization.

828221153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43590606.

The product of its digits is 7680, while the sum is 32.

The square root of 828221153 is about 28778.8316823321. The cubic root of 828221153 is about 939.1077821192.

The spelling of 828221153 in words is "eight hundred twenty-eight million, two hundred twenty-one thousand, one hundred fifty-three".