16313231 has 4 divisors (see below), whose sum is σ = 17796264. Its totient is φ = 14830200.

The previous prime is 16313221. The next prime is 16313287. The reversal of 16313231 is 13231361.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-16313231 is a prime.

It is a super-2 number, since 2×16313231² = 532243011318722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16313221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 741500 + ... + 741521.

It is an arithmetic number, because the mean of its divisors is an integer number (4449066).

Almost surely, 2^16313231 is an apocalyptic number.

16313231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16313231 is a deficient number, since it is larger than the sum of its proper divisors (1483033).

16313231 is a wasteful number, since it uses less digits than its factorization.

16313231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1483032.

The product of its digits is 324, while the sum is 20.

The square root of 16313231 is about 4038.9640998652. The cubic root of 16313231 is about 253.6179543840.

Adding to 16313231 its reverse (13231361), we get a palindrome (29544592).

The spelling of 16313231 in words is "sixteen million, three hundred thirteen thousand, two hundred thirty-one".