16221631343 has 4 divisors (see below), whose sum is σ = 16221886488. Its totient is φ = 16221376200.

The previous prime is 16221631301. The next prime is 16221631373. The reversal of 16221631343 is 34313612261.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 34313612261 = 29 ⋅1183228009.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16221631343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16221631373) 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, 52868 + ... + 187718.

It is an arithmetic number, because the mean of its divisors is an integer number (4055471622).

Almost surely, 2^16221631343 is an apocalyptic number.

16221631343 is a deficient number, since it is larger than the sum of its proper divisors (255145).

16221631343 is a wasteful number, since it uses less digits than its factorization.

16221631343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255144.

The product of its digits is 15552, while the sum is 32.

The spelling of 16221631343 in words is "sixteen billion, two hundred twenty-one million, six hundred thirty-one thousand, three hundred forty-three".