16223765 has 4 divisors (see below), whose sum is σ = 19468524. Its totient is φ = 12979008.

The previous prime is 16223747. The next prime is 16223783. The reversal of 16223765 is 56732261.

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 (16223747) and next prime (16223783).

It can be written as a sum of positive squares in 2 ways, for example, as 11566801 + 4656964 = 3401^2 + 2158^2 .

It is a cyclic number.

It is not a de Polignac number, because 16223765 - 2¹⁰ = 16222741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1622372 + ... + 1622381.

It is an arithmetic number, because the mean of its divisors is an integer number (4867131).

Almost surely, 2^16223765 is an apocalyptic number.

It is an amenable number.

16223765 is a deficient number, since it is larger than the sum of its proper divisors (3244759).

16223765 is an equidigital number, since it uses as much as digits as its factorization.

16223765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3244758.

The product of its digits is 15120, while the sum is 32.

The square root of 16223765 is about 4027.8735084409. The cubic root of 16223765 is about 253.1534686265.

The spelling of 16223765 in words is "sixteen million, two hundred twenty-three thousand, seven hundred sixty-five".