231601641 has 8 divisors (see below), whose sum is σ = 309216384. Its totient is φ = 154194000.

The previous prime is 231601613. The next prime is 231601663. The reversal of 231601641 is 146106132.

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

It is not a de Polignac number, because 231601641 - 2¹⁰ = 231600617 is a prime.

It is a super-2 number, since 2×231601641² = 107278640227785762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231601691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49146 + ... + 53651.

It is an arithmetic number, because the mean of its divisors is an integer number (38652048).

Almost surely, 2^231601641 is an apocalyptic number.

It is an amenable number.

231601641 is a deficient number, since it is larger than the sum of its proper divisors (77614743).

231601641 is a wasteful number, since it uses less digits than its factorization.

231601641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103551.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 231601641 is about 15218.4638186645. The cubic root of 231601641 is about 614.1114725441. Note that the first 3 decimals are identical.

Adding to 231601641 its reverse (146106132), we get a palindrome (377707773).

The spelling of 231601641 in words is "two hundred thirty-one million, six hundred one thousand, six hundred forty-one".