1225506527171 has 4 divisors (see below), whose sum is σ = 1226464704000. Its totient is φ = 1224548350344.

The previous prime is 1225506527149. The next prime is 1225506527209. The reversal of 1225506527171 is 1717256055221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1225506527171 - 2⁶ = 1225506527107 is a prime.

It is a super-2 number, since 2×1225506527171² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225506527101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 479086496 + ... + 479089053.

It is an arithmetic number, because the mean of its divisors is an integer number (306616176000).

Almost surely, 2^{1225506527171} is an apocalyptic number.

1225506527171 is a deficient number, since it is larger than the sum of its proper divisors (958176829).

1225506527171 is an equidigital number, since it uses as much as digits as its factorization.

1225506527171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958176828.

The product of its (nonzero) digits is 294000, while the sum is 44.

The spelling of 1225506527171 in words is "one trillion, two hundred twenty-five billion, five hundred six million, five hundred twenty-seven thousand, one hundred seventy-one".