171220883452 has 6 divisors (see below), whose sum is σ = 299636546048. Its totient is φ = 85610441724.

The previous prime is 171220883413. The next prime is 171220883563. The reversal of 171220883452 is 254388022171.

It is a junction number, because it is equal to n+sod(n) for n = 171220883399 and 171220883408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21402610428 + ... + 21402610435.

Almost surely, 2^171220883452 is an apocalyptic number.

It is an amenable number.

171220883452 is a deficient number, since it is larger than the sum of its proper divisors (128415662596).

171220883452 is a wasteful number, since it uses less digits than its factorization.

171220883452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42805220867 (or 42805220865 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 43.

The spelling of 171220883452 in words is "one hundred seventy-one billion, two hundred twenty million, eight hundred eighty-three thousand, four hundred fifty-two".