2625012581 has 2 divisors, whose sum is σ = 2625012582. Its totient is φ = 2625012580.

The previous prime is 2625012571. The next prime is 2625012661. The reversal of 2625012581 is 1852105262.

2625012581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1684363681 + 940648900 = 41041^2 + 30670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2625012581 is a prime.

It is a super-2 number, since 2×2625012581² = 13781382100816563122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2625012521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1312506290 + 1312506291.

It is an arithmetic number, because the mean of its divisors is an integer number (1312506291).

Almost surely, 2^2625012581 is an apocalyptic number.

It is an amenable number.

2625012581 is a deficient number, since it is larger than the sum of its proper divisors (1).

2625012581 is an equidigital number, since it uses as much as digits as its factorization.

2625012581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 2625012581 is about 51234.8766076391. The cubic root of 2625012581 is about 1379.4642919982.

The spelling of 2625012581 in words is "two billion, six hundred twenty-five million, twelve thousand, five hundred eighty-one".