171223367242172 has 48 divisors (see below), whose sum is σ = 342878757322752. Its totient is φ = 73288893175680.

The previous prime is 171223367242121. The next prime is 171223367242243. The reversal of 171223367242172 is 271242763322171.

It is a self number, because there is not a number n which added to its sum of digits gives 171223367242172.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156149288 + ... + 157242000.

It is an arithmetic number, because the mean of its divisors is an integer number (7143307444224).

Almost surely, 2^{171223367242172} is an apocalyptic number.

It is an amenable number.

171223367242172 is an abundant number, since it is smaller than the sum of its proper divisors (171655390080580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

171223367242172 is a wasteful number, since it uses less digits than its factorization.

171223367242172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099778 (or 1099776 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 50.

The spelling of 171223367242172 in words is "one hundred seventy-one trillion, two hundred twenty-three billion, three hundred sixty-seven million, two hundred forty-two thousand, one hundred seventy-two".