16213145 has 8 divisors (see below), whose sum is σ = 20952456. Its totient is φ = 11972736.

The previous prime is 16213139. The next prime is 16213147. The reversal of 16213145 is 54131261.

It can be written as a sum of positive squares in 4 ways, for example, as 760384 + 15452761 = 872^2 + 3931^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16213145 - 2¹⁰ = 16212121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16213145.

It is not an unprimeable number, because it can be changed into a prime (16213147) 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, 124652 + ... + 124781.

It is an arithmetic number, because the mean of its divisors is an integer number (2619057).

Almost surely, 2^16213145 is an apocalyptic number.

It is an amenable number.

16213145 is a deficient number, since it is larger than the sum of its proper divisors (4739311).

16213145 is a wasteful number, since it uses less digits than its factorization.

16213145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249451.

The product of its digits is 720, while the sum is 23.

The square root of 16213145 is about 4026.5549791354. The cubic root of 16213145 is about 253.0982188808.

The spelling of 16213145 in words is "sixteen million, two hundred thirteen thousand, one hundred forty-five".