225171472693 has 2 divisors, whose sum is σ = 225171472694. Its totient is φ = 225171472692.

The previous prime is 225171472657. The next prime is 225171472697. The reversal of 225171472693 is 396274171522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120924498564 + 104246974129 = 347742^2 + 322873^2 .

It is a cyclic number.

It is not a de Polignac number, because 225171472693 - 2³³ = 216581538101 is a prime.

It is a super-2 number, since 2×225171472693² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225171472697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112585736346 + 112585736347.

It is an arithmetic number, because the mean of its divisors is an integer number (112585736347).

Almost surely, 2^225171472693 is an apocalyptic number.

It is an amenable number.

225171472693 is a deficient number, since it is larger than the sum of its proper divisors (1).

225171472693 is an equidigital number, since it uses as much as digits as its factorization.

225171472693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 49.

The spelling of 225171472693 in words is "two hundred twenty-five billion, one hundred seventy-one million, four hundred seventy-two thousand, six hundred ninety-three".