231616361 has 8 divisors (see below), whose sum is σ = 237689760. Its totient is φ = 225574272.

The previous prime is 231616351. The next prime is 231616369. The reversal of 231616361 is 163616132.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231616361 is a prime.

It is a super-2 number, since 2×231616361² = 107292277365764642, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (231616369) 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 7 ways as a sum of consecutive naturals, for example, 7550 + ... + 22808.

It is an arithmetic number, because the mean of its divisors is an integer number (29711220).

Almost surely, 2^231616361 is an apocalyptic number.

It is an amenable number.

231616361 is a deficient number, since it is larger than the sum of its proper divisors (6073399).

231616361 is a wasteful number, since it uses less digits than its factorization.

231616361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15655.

The product of its digits is 3888, while the sum is 29.

The square root of 231616361 is about 15218.9474340376. The cubic root of 231616361 is about 614.1244827129.

The spelling of 231616361 in words is "two hundred thirty-one million, six hundred sixteen thousand, three hundred sixty-one".