171225883887451 has 4 divisors (see below), whose sum is σ = 171225963158400. Its totient is φ = 171225804616504.

The previous prime is 171225883887439. The next prime is 171225883887517. The reversal of 171225883887451 is 154788388522171.

It is a happy number.

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 171225883887451 - 2¹¹ = 171225883885403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171225883887251) 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, 36302011 + ... + 40746628.

It is an arithmetic number, because the mean of its divisors is an integer number (42806490789600).

Almost surely, 2^{171225883887451} is an apocalyptic number.

171225883887451 is a deficient number, since it is larger than the sum of its proper divisors (79270949).

171225883887451 is an equidigital number, since it uses as much as digits as its factorization.

171225883887451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79270948.

The product of its digits is 240844800, while the sum is 70.

The spelling of 171225883887451 in words is "one hundred seventy-one trillion, two hundred twenty-five billion, eight hundred eighty-three million, eight hundred eighty-seven thousand, four hundred fifty-one".