25015421107 has 2 divisors, whose sum is σ = 25015421108. Its totient is φ = 25015421106.

The previous prime is 25015421063. The next prime is 25015421177. The reversal of 25015421107 is 70112451052.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25015421107 is a prime.

It is a super-2 number, since 2×25015421107² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25015421177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12507710553 + 12507710554.

It is an arithmetic number, because the mean of its divisors is an integer number (12507710554).

Almost surely, 2^25015421107 is an apocalyptic number.

25015421107 is a deficient number, since it is larger than the sum of its proper divisors (1).

25015421107 is an equidigital number, since it uses as much as digits as its factorization.

25015421107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2800, while the sum is 28.

Adding to 25015421107 its reverse (70112451052), we get a palindrome (95127872159).

The spelling of 25015421107 in words is "twenty-five billion, fifteen million, four hundred twenty-one thousand, one hundred seven".