821530095 has 16 divisors (see below), whose sum is σ = 1315370112. Its totient is φ = 437842080.

The previous prime is 821530063. The next prime is 821530097. The reversal of 821530095 is 590035128.

It is not a de Polignac number, because 821530095 - 2⁵ = 821530063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821530097) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3780 + ... + 40710.

It is an arithmetic number, because the mean of its divisors is an integer number (82210632).

Almost surely, 2^821530095 is an apocalyptic number.

821530095 is a deficient number, since it is larger than the sum of its proper divisors (493840017).

821530095 is a wasteful number, since it uses less digits than its factorization.

821530095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38422.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 821530095 is about 28662.3462926537. The cubic root of 821530095 is about 936.5719769501.

The spelling of 821530095 in words is "eight hundred twenty-one million, five hundred thirty thousand, ninety-five".