172211342281 has 16 divisors (see below), whose sum is σ = 192471552000. Its totient is φ = 152719465600.

The previous prime is 172211342221. The next prime is 172211342323. The reversal of 172211342281 is 182243112271.

It is a cyclic number.

It is not a de Polignac number, because 172211342281 - 2²¹ = 172209245129 is a prime.

It is a super-2 number, since 2×172211342281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172211342221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5178495 + ... + 5211643.

It is an arithmetic number, because the mean of its divisors is an integer number (12029472000).

Almost surely, 2^172211342281 is an apocalyptic number.

172211342281 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

172211342281 is a deficient number, since it is larger than the sum of its proper divisors (20260209719).

172211342281 is a wasteful number, since it uses less digits than its factorization.

172211342281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44720.

The product of its digits is 10752, while the sum is 34.

The spelling of 172211342281 in words is "one hundred seventy-two billion, two hundred eleven million, three hundred forty-two thousand, two hundred eighty-one".