2565003437 has 2 divisors, whose sum is σ = 2565003438. Its totient is φ = 2565003436.

The previous prime is 2565003403. The next prime is 2565003473. The reversal of 2565003437 is 7343005652.

2565003437 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (2565003473) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2173517641 + 391485796 = 46621^2 + 19786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2565003437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2565003397 and 2565003406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2565002437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282501718 + 1282501719.

It is an arithmetic number, because the mean of its divisors is an integer number (1282501719).

Almost surely, 2^2565003437 is an apocalyptic number.

It is an amenable number.

2565003437 is a deficient number, since it is larger than the sum of its proper divisors (1).

2565003437 is an equidigital number, since it uses as much as digits as its factorization.

2565003437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 35.

The square root of 2565003437 is about 50645.8629801092. The cubic root of 2565003437 is about 1368.8714020270.

The spelling of 2565003437 in words is "two billion, five hundred sixty-five million, three thousand, four hundred thirty-seven".