231171166140 has 48 divisors (see below), whose sum is σ = 647323881120. Its totient is φ = 61641395200.

The previous prime is 231171166129. The next prime is 231171166151. The reversal of 231171166140 is 41661171132.

It is an interprime number because it is at equal distance from previous prime (231171166129) and next prime (231171166151).

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, 798976 + ... + 1049144.

It is an arithmetic number, because the mean of its divisors is an integer number (13485914190).

Almost surely, 2^231171166140 is an apocalyptic number.

231171166140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231171166140 is an abundant number, since it is smaller than the sum of its proper divisors (416152714980).

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

231171166140 is a wasteful number, since it uses less digits than its factorization.

231171166140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265582 (or 265580 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The spelling of 231171166140 in words is "two hundred thirty-one billion, one hundred seventy-one million, one hundred sixty-six thousand, one hundred forty".