25320012251 has 2 divisors, whose sum is σ = 25320012252. Its totient is φ = 25320012250.

The previous prime is 25320012247. The next prime is 25320012269. The reversal of 25320012251 is 15221002352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25320012251 - 2² = 25320012247 is a prime.

It is a super-2 number, since 2×25320012251² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25320012271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12660006125 + 12660006126.

It is an arithmetic number, because the mean of its divisors is an integer number (12660006126).

Almost surely, 2^25320012251 is an apocalyptic number.

25320012251 is a deficient number, since it is larger than the sum of its proper divisors (1).

25320012251 is an equidigital number, since it uses as much as digits as its factorization.

25320012251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 23.

The spelling of 25320012251 in words is "twenty-five billion, three hundred twenty million, twelve thousand, two hundred fifty-one".