231061271 has 4 divisors (see below), whose sum is σ = 264070032. Its totient is φ = 198052512.

The previous prime is 231061249. The next prime is 231061277. The reversal of 231061271 is 172160132.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-231061271 is a prime.

It is a super-2 number, since 2×231061271² = 106778621912270882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231061277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16504370 + ... + 16504383.

It is an arithmetic number, because the mean of its divisors is an integer number (66017508).

Almost surely, 2^231061271 is an apocalyptic number.

231061271 is a deficient number, since it is larger than the sum of its proper divisors (33008761).

231061271 is an equidigital number, since it uses as much as digits as its factorization.

231061271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33008760.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 231061271 is about 15200.6996878433. The cubic root of 231061271 is about 613.6334882526.

The spelling of 231061271 in words is "two hundred thirty-one million, sixty-one thousand, two hundred seventy-one".