25212215235503 has 2 divisors, whose sum is σ = 25212215235504. Its totient is φ = 25212215235502.

The previous prime is 25212215235499. The next prime is 25212215235541. The reversal of 25212215235503 is 30553251221252.

It is an a-pointer prime, because the next prime (25212215235541) can be obtained adding 25212215235503 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25212215235503 - 2² = 25212215235499 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25212215235563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12606107617751 + 12606107617752.

It is an arithmetic number, because the mean of its divisors is an integer number (12606107617752).

Almost surely, 2^{25212215235503} is an apocalyptic number.

25212215235503 is a deficient number, since it is larger than the sum of its proper divisors (1).

25212215235503 is an equidigital number, since it uses as much as digits as its factorization.

25212215235503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180000, while the sum is 38.

Adding to 25212215235503 its reverse (30553251221252), we get a palindrome (55765466456755).

The spelling of 25212215235503 in words is "twenty-five trillion, two hundred twelve billion, two hundred fifteen million, two hundred thirty-five thousand, five hundred three".