25131222213169 has 2 divisors, whose sum is σ = 25131222213170. Its totient is φ = 25131222213168.

The previous prime is 25131222213137. The next prime is 25131222213203. The reversal of 25131222213169 is 96131222213152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23745281105569 + 1385941107600 = 4872913^2 + 1177260^2 .

It is a cyclic number.

It is not a de Polignac number, because 25131222213169 - 2⁵ = 25131222213137 is a prime.

It is a super-2 number, since 2×25131222213169² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25131222213469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12565611106584 + 12565611106585.

It is an arithmetic number, because the mean of its divisors is an integer number (12565611106585).

Almost surely, 2^{25131222213169} is an apocalyptic number.

It is an amenable number.

25131222213169 is a deficient number, since it is larger than the sum of its proper divisors (1).

25131222213169 is an equidigital number, since it uses as much as digits as its factorization.

25131222213169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 40.

The spelling of 25131222213169 in words is "twenty-five trillion, one hundred thirty-one billion, two hundred twenty-two million, two hundred thirteen thousand, one hundred sixty-nine".