8051321025 has 60 divisors (see below), whose sum is σ = 16269677424. Its totient is φ = 3903660000.

The previous prime is 8051320987. The next prime is 8051321029. The reversal of 8051321025 is 5201231508.

It is a happy number.

It is not a de Polignac number, because 8051321025 - 2²⁸ = 7782885569 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 8051321025.

It is not an unprimeable number, because it can be changed into a prime (8051321029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 158451 + ... + 203000.

Almost surely, 2^8051321025 is an apocalyptic number.

It is an amenable number.

8051321025 is an abundant number, since it is smaller than the sum of its proper divisors (8218356399).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8051321025 is a wasteful number, since it uses less digits than its factorization.

8051321025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361484 (or 361470 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 8051321025 is about 89729.1537071425. The cubic root of 8051321025 is about 2004.2676392339.

The spelling of 8051321025 in words is "eight billion, fifty-one million, three hundred twenty-one thousand, twenty-five".