821348811 has 6 divisors (see below), whose sum is σ = 1186392740. Its totient is φ = 547565868.

The previous prime is 821348807. The next prime is 821348833. The reversal of 821348811 is 118843128.

It is not a de Polignac number, because 821348811 - 2² = 821348807 is a prime.

It is a super-2 number, since 2×821348811² = 1349227738662227442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (821348881) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45630481 + ... + 45630498.

Almost surely, 2^821348811 is an apocalyptic number.

821348811 is a deficient number, since it is larger than the sum of its proper divisors (365043929).

821348811 is a wasteful number, since it uses less digits than its factorization.

821348811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91260985 (or 91260982 counting only the distinct ones).

The product of its digits is 12288, while the sum is 36.

The square root of 821348811 is about 28659.1837113341. The cubic root of 821348811 is about 936.5030819271.

The spelling of 821348811 in words is "eight hundred twenty-one million, three hundred forty-eight thousand, eight hundred eleven".