231478169 has 8 divisors (see below), whose sum is σ = 255364872. Its totient is φ = 208460160.

The previous prime is 231478157. The next prime is 231478207. The reversal of 231478169 is 961874132.

231478169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 21576025 + 209902144 = 4645^2 + 14488^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231478169 - 2⁴ = 231478153 is a prime.

It is a super-2 number, since 2×231478169² = 107164285447185122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231478369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216614 + ... + 217679.

It is an arithmetic number, because the mean of its divisors is an integer number (31920609).

Almost surely, 2^231478169 is an apocalyptic number.

It is an amenable number.

231478169 is a deficient number, since it is larger than the sum of its proper divisors (23886703).

231478169 is a wasteful number, since it uses less digits than its factorization.

231478169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434347.

The product of its digits is 72576, while the sum is 41.

The square root of 231478169 is about 15214.4066266154. The cubic root of 231478169 is about 614.0023209708.

The spelling of 231478169 in words is "two hundred thirty-one million, four hundred seventy-eight thousand, one hundred sixty-nine".