25000415021 has 2 divisors, whose sum is σ = 25000415022. Its totient is φ = 25000415020.

The previous prime is 25000415003. The next prime is 25000415119. The reversal of 25000415021 is 12051400052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16811974921 + 8188440100 = 129661^2 + 90490^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25000415021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25000414984 and 25000415002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25000415521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12500207510 + 12500207511.

It is an arithmetic number, because the mean of its divisors is an integer number (12500207511).

Almost surely, 2^25000415021 is an apocalyptic number.

It is an amenable number.

25000415021 is a deficient number, since it is larger than the sum of its proper divisors (1).

25000415021 is an equidigital number, since it uses as much as digits as its factorization.

25000415021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 400, while the sum is 20.

Adding to 25000415021 its reverse (12051400052), we get a palindrome (37051815073).

The spelling of 25000415021 in words is "twenty-five billion, four hundred fifteen thousand, twenty-one".