25212215235499 has 2 divisors, whose sum is σ = 25212215235500. Its totient is φ = 25212215235498.

The previous prime is 25212215235421. The next prime is 25212215235503. The reversal of 25212215235499 is 99453251221252.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25212215235499 is a prime.

It is a super-2 number, since 2×25212215235499² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25212215235899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12606107617749 + 12606107617750.

It is an arithmetic number, because the mean of its divisors is an integer number (12606107617750).

Almost surely, 2^{25212215235499} is an apocalyptic number.

25212215235499 is a deficient number, since it is larger than the sum of its proper divisors (1).

25212215235499 is an equidigital number, since it uses as much as digits as its factorization.

25212215235499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888000, while the sum is 52.

The spelling of 25212215235499 in words is "twenty-five trillion, two hundred twelve billion, two hundred fifteen million, two hundred thirty-five thousand, four hundred ninety-nine".