16231138 has 16 divisors (see below), whose sum is σ = 30354624. Its totient is φ = 6323760.

The previous prime is 16231133. The next prime is 16231139. The reversal of 16231138 is 83113261.

It is not an unprimeable number, because it can be changed into a prime (16231133) 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, 52545 + ... + 52852.

It is an arithmetic number, because the mean of its divisors is an integer number (1897164).

Almost surely, 2^16231138 is an apocalyptic number.

16231138 is a deficient number, since it is larger than the sum of its proper divisors (14123486).

16231138 is a wasteful number, since it uses less digits than its factorization.

16231138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105417.

The product of its digits is 864, while the sum is 25.

The square root of 16231138 is about 4028.7886516917. The cubic root of 16231138 is about 253.1918119221.

Adding to 16231138 its reverse (83113261), we get a palindrome (99344399).

The spelling of 16231138 in words is "sixteen million, two hundred thirty-one thousand, one hundred thirty-eight".