830021213025 has 27 divisors (see below), whose sum is σ = 1486684694521. Its totient is φ = 442670691840.

The previous prime is 830021213011. The next prime is 830021213039. The reversal of 830021213025 is 520312120038.

The square root of 830021213025 is 911055.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (830021213011) and next prime (830021213039).

It can be written as a sum of positive squares in 4 ways, for example, as 2889170001 + 827132043024 = 53751^2 + 909468^2 .

It is not a de Polignac number, because 830021213025 - 2²⁷ = 829886995297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 830021213025.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 13635457 + ... + 13696193.

Almost surely, 2^830021213025 is an apocalyptic number.

830021213025 is the 911055-th square number.

830021213025 is the 455528-th centered octagonal number.

It is an amenable number.

830021213025 is a deficient number, since it is larger than the sum of its proper divisors (656663481496).

830021213025 is an frugal number, since it uses more digits than its factorization.

830021213025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121490 (or 60745 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The spelling of 830021213025 in words is "eight hundred thirty billion, twenty-one million, two hundred thirteen thousand, twenty-five".