16500070331 has 4 divisors (see below), whose sum is σ = 16779732600. Its totient is φ = 16220408064.

The previous prime is 16500070319. The next prime is 16500070343. The reversal of 16500070331 is 13307000561.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (16500070319) and next prime (16500070343).

It is a cyclic number.

It is not a de Polignac number, because 16500070331 - 2¹⁰ = 16500069307 is a prime.

It is a super-2 number, since 2×16500070331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16500070331.

It is not an unprimeable number, because it can be changed into a prime (16500076331) 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, 139831046 + ... + 139831163.

It is an arithmetic number, because the mean of its divisors is an integer number (4194933150).

Almost surely, 2^16500070331 is an apocalyptic number.

16500070331 is a deficient number, since it is larger than the sum of its proper divisors (279662269).

16500070331 is an equidigital number, since it uses as much as digits as its factorization.

16500070331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279662268.

The product of its (nonzero) digits is 1890, while the sum is 26.

Adding to 16500070331 its reverse (13307000561), we get a palindrome (29807070892).

The spelling of 16500070331 in words is "sixteen billion, five hundred million, seventy thousand, three hundred thirty-one".