7251855081 has 32 divisors (see below), whose sum is σ = 10257159168. Its totient is φ = 4547780160.

The previous prime is 7251855049. The next prime is 7251855109. The reversal of 7251855081 is 1805581527.

It is not a de Polignac number, because 7251855081 - 2⁵ = 7251855049 is a prime.

It is a super-2 number, since 2×7251855081² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7251855031) 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 31 ways as a sum of consecutive naturals, for example, 4349410 + ... + 4351076.

It is an arithmetic number, because the mean of its divisors is an integer number (320536224).

Almost surely, 2^7251855081 is an apocalyptic number.

It is an amenable number.

7251855081 is a deficient number, since it is larger than the sum of its proper divisors (3005304087).

7251855081 is a wasteful number, since it uses less digits than its factorization.

7251855081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2701.

The product of its (nonzero) digits is 112000, while the sum is 42.

The square root of 7251855081 is about 85157.8245436084. The cubic root of 7251855081 is about 1935.6033818619.

The spelling of 7251855081 in words is "seven billion, two hundred fifty-one million, eight hundred fifty-five thousand, eighty-one".