821453116 has 12 divisors (see below), whose sum is σ = 1568228760. Its totient is φ = 373387760.

The previous prime is 821453093. The next prime is 821453117. The reversal of 821453116 is 611354128.

821453116 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×821453116² = 1349570443572218912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821453117) 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, 9334651 + ... + 9334738.

It is an arithmetic number, because the mean of its divisors is an integer number (130685730).

Almost surely, 2^821453116 is an apocalyptic number.

It is an amenable number.

821453116 is a deficient number, since it is larger than the sum of its proper divisors (746775644).

821453116 is a wasteful number, since it uses less digits than its factorization.

821453116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18669404 (or 18669402 counting only the distinct ones).

The product of its digits is 5760, while the sum is 31.

The square root of 821453116 is about 28661.0034018350. The cubic root of 821453116 is about 936.5427231522.

The spelling of 821453116 in words is "eight hundred twenty-one million, four hundred fifty-three thousand, one hundred sixteen".