10000025521 has 2 divisors, whose sum is σ = 10000025522. Its totient is φ = 10000025520.

The previous prime is 10000025507. The next prime is 10000025561. The reversal of 10000025521 is 12552000001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9875390625 + 124634896 = 99375^2 + 11164^2 .

It is a cyclic number.

It is not a de Polignac number, because 10000025521 - 2¹⁷ = 9999894449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10000025495 and 10000025504.

It is not a weakly prime, because it can be changed into another prime (10000025561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5000012760 + 5000012761.

It is an arithmetic number, because the mean of its divisors is an integer number (5000012761).

Almost surely, 2^10000025521 is an apocalyptic number.

It is an amenable number.

10000025521 is a deficient number, since it is larger than the sum of its proper divisors (1).

10000025521 is an equidigital number, since it uses as much as digits as its factorization.

10000025521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100, while the sum is 16.

Adding to 10000025521 its reverse (12552000001), we get a palindrome (22552025522).

It can be divided in two parts, 100000 and 25521, that added together give a palindrome (125521).

The spelling of 10000025521 in words is "ten billion, twenty-five thousand, five hundred twenty-one".