225172620671 has 2 divisors, whose sum is σ = 225172620672. Its totient is φ = 225172620670.

The previous prime is 225172620619. The next prime is 225172620733. The reversal of 225172620671 is 176026271522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225172620671 - 2³⁴ = 207992751487 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225172620271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112586310335 + 112586310336.

It is an arithmetic number, because the mean of its divisors is an integer number (112586310336).

Almost surely, 2^225172620671 is an apocalyptic number.

225172620671 is a deficient number, since it is larger than the sum of its proper divisors (1).

225172620671 is an equidigital number, since it uses as much as digits as its factorization.

225172620671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 225172620671 in words is "two hundred twenty-five billion, one hundred seventy-two million, six hundred twenty thousand, six hundred seventy-one".