7853225021 has 12 divisors (see below), whose sum is σ = 8499772692. Its totient is φ = 7251798528.

The previous prime is 7853224979. The next prime is 7853225033. The reversal of 7853225021 is 1205223587.

It can be written as a sum of positive squares in 6 ways, for example, as 2895516100 + 4957708921 = 53810^2 + 70411^2 .

It is a de Polignac number, because none of the positive numbers 2^k-7853225021 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7853225921) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 241040 + ... + 271673.

It is an arithmetic number, because the mean of its divisors is an integer number (708314391).

Almost surely, 2^7853225021 is an apocalyptic number.

It is an amenable number.

7853225021 is a deficient number, since it is larger than the sum of its proper divisors (646547671).

7853225021 is a wasteful number, since it uses less digits than its factorization.

7853225021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512800 (or 512783 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 7853225021 is about 88618.4237108740. The cubic root of 7853225021 is about 1987.6931781484.

The spelling of 7853225021 in words is "seven billion, eight hundred fifty-three million, two hundred twenty-five thousand, twenty-one".