171270531251 has 12 divisors (see below), whose sum is σ = 179073508488. Its totient is φ = 163794094464.

The previous prime is 171270531241. The next prime is 171270531293. The reversal of 171270531251 is 152135072171.

It is a de Polignac number, because none of the positive numbers 2^k-171270531251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171270531241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3207296 + ... + 3260258.

It is an arithmetic number, because the mean of its divisors is an integer number (14922792374).

Almost surely, 2^171270531251 is an apocalyptic number.

171270531251 is a deficient number, since it is larger than the sum of its proper divisors (7802977237).

171270531251 is an equidigital number, since it uses as much as digits as its factorization.

171270531251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59122 (or 59099 counting only the distinct ones).

The product of its (nonzero) digits is 14700, while the sum is 35.

The spelling of 171270531251 in words is "one hundred seventy-one billion, two hundred seventy million, five hundred thirty-one thousand, two hundred fifty-one".