231006158161 has 9 divisors (see below), whose sum is σ = 241498145371. Its totient is φ = 220951838272.

The previous prime is 231006158153. The next prime is 231006158183. The reversal of 231006158161 is 161851600132.

The square root of 231006158161 is 480631.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 137036934225 + 93969223936 = 370185^2 + 306544^2 .

It is not a de Polignac number, because 231006158161 - 2³ = 231006158153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231006158101) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11044065 + ... + 11064961.

Almost surely, 2^231006158161 is an apocalyptic number.

231006158161 is the 480631-st square number.

231006158161 is the 240316-th centered octagonal number.

It is an amenable number.

231006158161 is a deficient number, since it is larger than the sum of its proper divisors (10491987210).

231006158161 is an frugal number, since it uses more digits than its factorization.

231006158161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41840 (or 20920 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 34.

Adding to 231006158161 its reverse (161851600132), we get a palindrome (392857758293).

The spelling of 231006158161 in words is "two hundred thirty-one billion, six million, one hundred fifty-eight thousand, one hundred sixty-one".