231216371 has 16 divisors (see below), whose sum is σ = 248609088. Its totient is φ = 214272000.

The previous prime is 231216361. The next prime is 231216389. The reversal of 231216371 is 173612132.

231216371 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 231216371 - 2¹⁴ = 231199987 is a prime.

It is a super-2 number, since 2×231216371² = 106922020436819282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231216371.

It is not an unprimeable number, because it can be changed into a prime (231216311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 533771 + ... + 534203.

It is an arithmetic number, because the mean of its divisors is an integer number (15538068).

Almost surely, 2^231216371 is an apocalyptic number.

231216371 is a deficient number, since it is larger than the sum of its proper divisors (17392717).

231216371 is a wasteful number, since it uses less digits than its factorization.

231216371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862.

The product of its digits is 1512, while the sum is 26.

The square root of 231216371 is about 15205.8005708348. The cubic root of 231216371 is about 613.7707581438.

It can be divided in two parts, 23121 and 6371, that added together give a palindrome (29492).

The spelling of 231216371 in words is "two hundred thirty-one million, two hundred sixteen thousand, three hundred seventy-one".